This appendix is not available as an online form Please fill in and submit as a PDF announcement +Rule 3.10.3A, 3.10.3B, 3.10.3C + See chapter 19 for defined terms 31 January 2020 Page 1 Appendix 3G Notification of issue, conversion or payment up of equity +securities Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX’s property and may be made public. If you are an entity incorporated outside Australia and you are issuing a new class of +securities other than CDIs, you will need to obtain and provide an International Securities Identification Number (ISIN) for that class. Further information on the requirement for the notification of an ISIN is available from the Create Online Forms page. ASX is unable to create the new ISIN for non-Australian issuers. *Denotes minimum information required for first lodgement of this form, with exceptions provided in specific notes for certain questions. The balance of the information, where applicable, must be provided as soon as reasonably practicable by the entity. Part 1 – Entity and announcement details Question no Question Answer 1.1 *Name of entity We (the entity here named) give notice of the issue, conversion or payment up of the following unquoted +securities. James Hardie Industries plc 1.2 *Registration type and number Please supply your ABN, ARSN, ARBN, ACN or another registration type and number (if you supply another registration type, please specify both the type of registration and the registration number). 097 829 895 1.3 *ASX issuer code JHX 1.4 *This announcement is Tick whichever is applicable. ☒ A new announcement ☐ An update/amendment to a previous announcement ☐ A cancellation of a previous announcement 1.4a *Reason for update Mandatory only if “Update” ticked in Q1.4 above. A reason must be provided for an update. N/A 1.4b *Date of previous announcement to this update Mandatory only if “Update” ticked in Q1.4 above. N/A 1.4c *Reason for cancellation Mandatory only if “Cancellation” ticked in Q1.4 above. N/A 1.4d *Date of previous announcement to this cancellation Mandatory only if “Cancellation” ticked in Q1.4 above. N/A 1.5 *Date of this announcement 16 December 2020 Exhibit 99.3

This appendix is not available as an online form Appendix 3G Please fill in and submit as a PDF announcement Notification of issue, conversion or payment up of equity +securities + See chapter 19 for defined terms 31 January 2020 Page 2 Part 2 – Type of issue Question No. Question Answer 2.1 *The +securities the subject of this notification are: Select whichever item is applicable. If you wish to notify ASX of different types of issues of securities, please complete a separate Appendix 3G for each type of issue. ☐ +Securities issued as a result of options being exercised or other +convertible +securities being converted and that are not to be quoted on ASX ☐ Partly paid +securities that have been fully paid up and that are not to be quoted on ASX ☒ +Securities issued under an +employee incentive scheme that are not being immediately quoted on ASX ☐ Other [please specify] If you have selected ‘other’ please provide the circumstances of the issue here: 2.2a.1 Please state the number and type of options that were exercised or other +convertible securities that were converted (including their ASX security code if available)? Answer this question if your response to Q2.1 is “securities issued as a result of options being exercised or other convertible securities being converted and that are not to be quoted on ASX”. N/A 2.2a.2 And the date the options were exercised or other +convertible securities were converted: Answer this question if your response to Q2.1 is “securities issued as a result of options being exercised or other convertible securities being converted and that are not to be quoted on ASX”. Note: If this occurred over a range of dates, enter the date the last of the options was exercised or convertible securities was converted. N/A 2.2b.1 Please state the number and type of partly paid +securities that were fully paid up (including their ASX security code if available)? Answer this question if your response to Q2.1 is “partly paid securities that have been paid up and that are not to be quoted on ASX”. N/A 2.2b.2 And the date the +securities were fully paid up: Answer this question if your response to Q2.1 is “partly paid securities that have been paid up and that are not to be quoted on ASX”. Note: If this occurred over a range of dates, enter the date the last of the securities was fully paid up. N/A

This appendix is not available as an online form Appendix 3G Please fill in and submit as a PDF announcement Notification of issue, conversion or payment up of equity +securities + See chapter 19 for defined terms 31 January 2020 Page 3 2.2c.1 Please state the number and type of +securities (including their ASX security code) issued under an +employee incentive scheme that are not being immediately quoted on ASX Answer this question if your response to Q2.1 is “securities issued under an employee incentive scheme that are not being immediately quoted on ASX”. 7,534 Restricted Stock Units (RSUs) being contractual entitlements granted to employees under the James Hardie Industries 2001 Equity Incentive Plan (2001 Plan) to be issued ordinary shares/CDIs upon satisfaction of certain conditions. 209,214 Restricted Stock Units (RSUs) granted under the James Hardie Industries Long Term Incentive Plan 2006 (2006 Plan), which comprise of the following  Grant of 82,131 Returned on Capital Employed (ROCE) RSUs, under the 2006 LTI Plan as part of the annual grant to the CEO as approved at the annual AGM for FY2021. ROCE RSUs are contractual entitlements to be issued ordinary shares/CDIs upon satisfaction of certain conditions; and  Grant of 127,083 Relative Total Shareholder Return (TSR) RSUs, under the 2006 LTI Plan as part of the annual grant to the CEO as approved at the AGM for FY2021. Relative TSR RSUs are contractual entitlements to be issued ordinary shares/CDIs upon satisfaction of certain conditions. 2.2c.2 *Please attach a document or provide details of a URL link for a document lodged with ASX detailing the terms of the +employee incentive scheme or a summary of the terms. Answer this question if your response to Q2.1 is “securities issued under an employee incentive scheme that are not being immediately quoted on ASX”. Refer to 2001 Plan https://ir.jameshardie.com.au/public/downloa d.jsp?id=5562 Refer to 2006 Plan https://ir.jameshardie.com.au/public/downloa d.jsp?id=5390 2.2c.3 *Are any of these +securities being issued to +key management personnel (KMP) or an +associate Answer this question if your response to Q2.1 is “securities issued under an employee incentive scheme that are not being immediately quoted on ASX”. Yes 2.2c.3.a *Provide details of the recipients and the number of +securities issued to each of them. Answer this question if your response to Q2.1 is “securities issued under an employee incentive scheme that are not being immediately quoted on ASX” and your response to Q2.2c.3 is “Yes”. Repeat the detail in the table below for each KMP involved in the issue. If the securities are being issued to the KMP, repeat the name of the KMP or insert “Same” in “Name of registered holder”. If the securities are being issued to an associate of a KMP, insert the name of the associate in “Name of registered holder”. Name of KMP Name of registered holder Number of +securities Jack Truong Jack Truong Same Same 82,131 ROCE RSUs 127,083 TSR RSUs

This appendix is not available as an online form Appendix 3G Please fill in and submit as a PDF announcement Notification of issue, conversion or payment up of equity +securities + See chapter 19 for defined terms 31 January 2020 Page 4 2.2d.1 *The purpose(s) for which the entity is issuing the +securities is: Answer this question if your response to Q2.1 is “Other”. You may select one or more of the items in the list. ☐ To raise additional working capital ☐ To fund the retirement of debt ☐ To pay for the acquisition of an asset [provide details below] ☐ To pay for services rendered [provide details below] ☐ Other [provide details below] Additional details: 2.2d.2 Please provide any further information needed to understand the circumstances in which you are notifying the issue of these +securities to ASX, including (if applicable) why the issue of the +securities has not been previously announced to the market in an Appendix 3B You must answer this question if your response to Q2.1 is “Other”. If there is no other information to provide, please answer “Not applicable” or “N/A”. N/A 2.3 *The +securities being issued are: Tick whichever is applicable ☒ Additional +securities in an existing unquoted class that is already recorded by ASX ("existing class") ☐ New +securities in an unquoted class that is not yet recorded by ASX ("new class") Part 3A – number and type of +securities being issued (existing class) Answer the questions in this part if your response to Q2.3 is “existing class”. Question No. Question Answer 3A.1 *ASX security code & description RSU 3A.2 *Number of +securities being issued 7,534 RSUs under the 2001 Plan 209,214 RSUs under the 2006 Plan 3A.3a *Will the +securities being issued rank equally in all respects from their issue date with the existing issued +securities in that class? Yes 3A.3b *Is the actual date from which the +securities will rank equally (non-ranking end date) known? Answer this question if your response to Q3A.3a is “No”. N/A 3A.3c *Provide the actual non-ranking end date Answer this question if your response to Q3A.3a is “No” and your response to Q3A.3b is “Yes”. N/A 3A.3d *Provide the estimated non-ranking end period Answer this question if your response to Q3A.3a is “No” and your response to Q3A.3b is “No”. N/A

This appendix is not available as an online form Appendix 3G Please fill in and submit as a PDF announcement Notification of issue, conversion or payment up of equity +securities + See chapter 19 for defined terms 31 January 2020 Page 5 3A.3e *Please state the extent to which the +securities do not rank equally:  in relation to the next dividend, distribution or interest payment; or  for any other reason Answer this question if your response to Q3A.3a is “No”. For example, the securities may not rank at all, or may rank proportionately based on the percentage of the period in question they have been on issue, for the next dividend, distribution or interest payment; or they may not be entitled to participate in some other event, such as an entitlement issue. N/A Part 3B – number and type of +securities being issued (new class) Answer the questions in this part if your response to Q2.3 is “new class”. Question No. Question Answer 3B.1 *Security description N/A 3B.2 *Security type Select one item from the list that best describes the securities the subject of this form. This will determine more detailed questions to be asked about the security later in this section. Select “ordinary fully or partly paid shares/units” for stapled securities or CDIs. For interest rate securities, please select the appropriate choice from either “Convertible debt securities” or “Non- convertible debt securities”. Select “Other” for performance shares/units and performance options/rights or if the selections available in the list do not appropriately describe the security being issued. ☐ Ordinary fully or partly paid shares/units ☐ Options ☐ +Convertible debt securities ☐ Non-convertible +debt securities ☐ Redeemable preference shares/units ☐ Other 3B.3 ISIN code Answer this question if you are an entity incorporated outside Australia and you are issuing a new class of securities other than CDIs. See also the note at the top of this form. N/A 3B.4 *Number of +securities being issued N/A 3B.5a *Will all the +securities issued in this class rank equally in all respects from the issue date? N/A 3B.5b *Is the actual date from which the +securities will rank equally (non-ranking end date) known? Answer this question if your response to Q3B.5a is “No”. N/A 3B.5c *Provide the actual non-ranking end date Answer this question if your response to Q3B.5a is “No” and your response to Q3B.5b is “Yes”. N/A 3B.5d *Provide the estimated non-ranking end period Answer this question if your response to Q3B.5a is “No” and your response to Q3B.5b is “No”. N/A

This appendix is not available as an online form Appendix 3G Please fill in and submit as a PDF announcement Notification of issue, conversion or payment up of equity +securities + See chapter 19 for defined terms 31 January 2020 Page 6 3B.5e *Please state the extent to which the +securities do not rank equally:  in relation to the next dividend, distribution or interest payment; or  for any other reason Answer this question if your response to Q3B.5a is “No”. For example, the securities may not rank at all, or may rank proportionately based on the percentage of the period in question they have been on issue, for the next dividend, distribution or interest payment; or they may not be entitled to participate in some other event, such as an entitlement issue. N/A 3B.6 Please attach a document or provide a URL link for a document lodged with ASX setting out the material terms of the +securities being issued You may cross reference a disclosure document, PDS, information memorandum, investor presentation or other announcement with this information provided it has been released to the ASX Market Announcements Platform. N/A 3B.7 *Have you received confirmation from ASX that the terms of the +securities are appropriate and equitable under listing rule 6.1? Answer this question only if you are an ASX Listing. (ASX Foreign Exempt Listings and ASX Debt Listings do not have to answer this question). If your response is “No” and the securities have any unusual terms, you should approach ASX as soon as possible for confirmation under listing rule 6.1 that the terms are appropriate and equitable. N/A 3B.8a Ordinary fully or partly paid shares/units details Answer the questions in this section if you selected this security type in your response to Question 3B.2. *+Security currency This is the currency in which the face amount of an issue is denominated. It will also typically be the currency in which distributions are declared. N/A *Will there be CDIs issued over the +securities? N/A *CDI ratio Answer this question if you answered “Yes” to the previous question. This is the ratio at which CDIs can be transmuted into the underlying security (e.g. 4:1 means 4 CDIs represent 1 underlying security whereas 1:4 means 1 CDI represents 4 underlying securities). N/A *Is it a partly paid class of +security? N/A *Paid up amount: unpaid amount Answer this question if answered “Yes” to the previous question. The paid up amount represents the amount of application money and/or calls which have been paid on any security considered ‘partly paid’ The unpaid amount represents the unpaid or yet to be called amount on any security considered ‘partly paid’. The amounts should be provided per the security currency (e.g. if the security currency is AUD, then the paid up and unpaid amount per security in AUD). N/A

This appendix is not available as an online form Appendix 3G Please fill in and submit as a PDF announcement Notification of issue, conversion or payment up of equity +securities + See chapter 19 for defined terms 31 January 2020 Page 7 *Is it a stapled +security? This is a security class that comprises a number of ordinary shares and/or ordinary units issued by separate entities that are stapled together for the purposes of trading. N/A 3B.8b Option details Answer the questions in this section if you selected this security type in your response to Question 3B.2. *+Security currency This is the currency in which the exercise price is payable. N/A *Exercise price The price at which each option can be exercised and convert into the underlying security. If there is no exercise price please answer as $0.00. The exercise price should be provided per the security currency (i.e. if the security currency is AUD, the exercise price should be expressed in AUD). N/A *Expiry date The date on which the options expire or terminate. N/A *Details of the number and type of +security (including its ASX security code if the +security is quoted on or recorded by ASX) that will be issued if an option is exercised For example, if the option can be exercised to receive one fully paid ordinary share with ASX security code ABC, please insert “One fully paid ordinary share (ASX:ABC)“. N/A 3B.8c Details of non-convertible +debt securities, +convertible debt securities, or redeemable preference shares/units Answer the questions in this section if you selected one of these security types in your response to Question 3B.2. Refer to Guidance Note 34 and the “Guide to the Naming Conventions and Security Descriptions for ASX Quoted Debt and Hybrid Securities” for further information on certain terms used in this section *Type of +security Select one item from the list ☐ Simple corporate bond ☐ Non-convertible note or bond ☐ Convertible note or bond ☐ Preference share/unit ☐ Capital note ☐ Hybrid security ☐ Other *+Security currency This is the currency in which the face value of the security is denominated. It will also typically be the currency in which interest or distributions are paid. N/A Face value This is the principal amount of each security. The face value should be provided per the security currency (i.e. if security currency is AUD, then the face value per security in AUD). N/A

This appendix is not available as an online form Appendix 3G Please fill in and submit as a PDF announcement Notification of issue, conversion or payment up of equity +securities + See chapter 19 for defined terms 31 January 2020 Page 8 *Interest rate type Select one item from the list Select the appropriate interest rate type per the terms of the security. Definitions for each type are provided in the Guide to the Naming Conventions and Security Descriptions for ASX Quoted Debt and Hybrid Securities ☐ Fixed rate ☐ Floating rate ☐ Indexed rate ☐ Variable rate ☐ Zero coupon/no interest ☐ Other Frequency of coupon/interest payments per year Select one item from the list. ☐ Monthly ☐ Quarterly ☐ Semi-annual ☐ Annual ☐ No coupon/interest payments ☐ Other First interest payment date A response is not required if you have selected “No coupon/interest payments” in response to the question above on the frequency of coupon/interest payments N/A N/A N/A *Is the interest rate per annum estimated at this time? Answer this question if the interest rate type is fixed. N/A If the interest rate per annum is estimated, then what is the date for this information to be announced to the market (if known) Answer this question if the interest rate type is fixed and your response to the previous question is “Yes”. Answer “Unknown” if the date is not known at this time. N/A *Does the interest rate include a reference rate, base rate or market rate (e.g. BBSW or CPI)? Answer this question if the interest rate type is floating or indexed N/A *What is the reference rate, base rate or market rate? Answer this question if the interest rate type is floating or indexed and your response to the previous question is “Yes”. N/A *Does the interest rate include a margin above the reference rate, base rate or market rate? Answer this question if the interest rate type is floating or indexed. N/A N/A N/A

This appendix is not available as an online form Appendix 3G Please fill in and submit as a PDF announcement Notification of issue, conversion or payment up of equity +securities + See chapter 19 for defined terms 31 January 2020 Page 9 *S128F of the Income Tax Assessment Act status applicable to the +security Select one item from the list For financial products which are likely to give rise to a payment to which s128F of the Income Tax Assessment Act applies, ASX requests issuers to confirm the s128F status of the security:  “s128F exempt” means interest payments are not taxable to non-residents;  “Not s128F exempt” means interest payments are taxable to non-residents;  “s128F exemption status unknown” means the issuer is unable to advise the status;  “Not applicable” means s128F is not applicable to this security ☐ s128F exempt ☐ Not s128F exempt ☐ s128F exemption status unknown ☐ Not applicable *Is the +security perpetual (i.e. no maturity date)? N/A *Maturity date Answer this question if the security is not perpetual N/A *Select other features applicable to the +security Up to 4 features can be selected. Further information is available in the Guide to the Naming Conventions and Security Descriptions for ASX Quoted Debt and Hybrid Securities. ☐ Simple ☐ Subordinated ☐ Secured ☐ Converting ☐ Convertible ☐ Transformable ☐ Exchangeable ☐ Cumulative ☐ Non-Cumulative ☐ Redeemable ☐ Extendable ☐ Reset ☐ Step-Down ☐ Step-Up ☐ Stapled ☐ None of the above *Is there a first trigger date on which a right of conversion, redemption, call or put can be exercised (whichever is first)? N/A *If yes, what is the first trigger date Answer this question if your response to the previous question is “Yes”. N/A Details of the number and type of +security (including its ASX security code if the +security is quoted on ASX) that will be issued if the securities to be quoted are converted, transformed or exchanged Answer this question if the security features include “converting”, “convertible”, “transformable” or “exchangeable”. For example, if the security can be converted into 1,000 fully paid ordinary shares with ASX security code ABC, please insert “1,000 fully paid ordinary shares (ASX:ABC)“. N/A

This appendix is not available as an online form Appendix 3G Please fill in and submit as a PDF announcement Notification of issue, conversion or payment up of equity +securities + See chapter 19 for defined terms 31 January 2020 Page 10 Part 4 – Issue details Question No. Question Answer 4.1 *Have the +securities been issued yet? Yes 4.1a *What was their date of issue? Answer this question if your response to Q4.1 is “Yes”. 9 December 2020 (US time) (2001 Plan) 5 November 2020 (US time) (2006 Plan) 4.1b *What is their proposed date of issue? Answer this question if your response to Q4.1 is “No”. N/A 4.2 *Are the +securities being issued for a cash consideration? If the securities are being issued for nil cash consideration, answer this question “No”. No 4.2a *In what currency is the cash consideration being paid For example, if the consideration is being paid in Australian Dollars, state AUD. Answer this question if your response to Q4.2 is “Yes”. N/A 4.2b *What is the issue price per +security Answer this question if your response to Q4.2 is “Yes” and by reference to the issue currency provided in your response to Q4.2a. Note: you cannot enter a nil amount here. If the securities are being issued for nil cash consideration, answer Q4.2 as “No” and complete Q4.2c. N/A 4.2c Please describe the consideration being provided for the +securities Answer this question if your response to Q4.2 is “No”. Total of 7,534 RSUs granted as awards under the 2001 Plan and intended to promote the Company’s long term financial interests by encouraging management to acquire an ownership position in the Company, aligning their interests with those of the Company’s security holders. Total of 209,214 RSUs granted as follows:  grant of 82,131 ROCE RSUs, under the 2006 LTI Plan as part of the annual grant to the CEO for FY2021; and  grant of 127,083 Relative TSR RSUs, under the 2006 LTI Plan as part of the annual grant to the CEO for FY2021. 4.3 Any other information the entity wishes to provide about the issue N/A

This appendix is not available as an online form Appendix 3G Please fill in and submit as a PDF announcement Notification of issue, conversion or payment up of equity +securities + See chapter 19 for defined terms 31 January 2020 Page 11 Part 5 – Unquoted +securities on issue Following the issue of the +securities the subject of this application, the unquoted issued +securities of the entity will comprise: Note: the figures provided in the table in section 5.1 below are used to calculate part of the total market capitalisation of the entity published by ASX from time to time. Please make sure you include in the table each class of unquoted securities issued by the entity. Restricted securities should be included in table 5.1. 5.1 *ASX security code and description *Total number of +securities on issue 2001 Plan RSUs 606,235 (equivalent to 606,235 CDIs) No 2001 Plan RSUs have been cancelled. 2006 Plan RSUs 2,158,819 (equivalent to 2,158,819 CDIs) No 2006 Plan RSUs have been cancelled. Part 6 – Other Listing Rule requirements The questions in this Part should only be answered if you are an ASX Listing (ASX Foreign Exempt Listings and ASX Debt Listings do not need to complete this Part) and: - your response to Q2.1 is “+securities issued under an +employee incentive scheme that are not being immediately quoted on ASX”; or - your response to Q2.1 is “Other” Question No. Question Answer 6.1 *Are the securities being issued under Listing Rule 7.2 exception 131 and therefore the issue does not need any security holder approval under Listing Rule 7.1? Answer this question if your response to Q2.1 is “securities issued under an employee incentive scheme that are not being immediately quoted on ASX”. Yes – 2006 Plan RSUs No – 2001 Plan RSUs 1 Exception 13 An issue of securities under an employee incentive scheme if within 3 years before the issue date: (a) in the case of a scheme established before the entity was listed – a summary of the terms of the scheme and the maximum number of equity securities proposed to be issued under the scheme were set out in the prospectus, PDS or information memorandum lodged with ASX under rule 1.1 condition 3; or (b) the holders of the entity’s ordinary securities have approved the issue of equity securities under the scheme as an exception to this rule. The notice of meeting must have included:  a summary of the terms of the scheme.  the number of securities issued under the scheme since the entity was listed or the date of the last approval under this rule;  the maximum number of +equity securities proposed to be issued under the scheme following the approval; and  a voting exclusion statement.

This appendix is not available as an online form Appendix 3G Please fill in and submit as a PDF announcement Notification of issue, conversion or payment up of equity +securities + See chapter 19 for defined terms 31 January 2020 Page 12 6.2 *Has the entity obtained, or is it obtaining, +security holder approval for the issue under listing rule 7.1? Answer this question if the response to Q6.1 is “No”. No 6.2a *Date of meeting or proposed meeting to approve the issue under listing rule 7.1 Answer this question if the response to Q6.1 is “No” and the response to Q6.2 is “Yes”. N/A 6.2b *Are any of the +securities being issued without +security holder approval using the entity’s 15% placement capacity under listing rule 7.1? Answer this question if the response to Q6.1 is “No” and the response to Q6.2 is “No”. Yes – 2001 Plan RSUs 6.2b.1 *How many +securities are being issued without +security holder approval using the entity’s 15% placement capacity under listing rule 7.1? Answer this question if the response to Q6.1 is “No”, the response to Q6.2 is “No” and the response to Q6.2b is “Yes”. Please complete and separately send by email to your ASX listings adviser a work sheet in the form of Annexure B to Guidance Note 21 confirming the entity has the available capacity under listing rule 7.1 to issue that number of securities. 7,534 RSUs 6.2c *Are any of the +securities being issued without +security holder approval using the entity’s additional 10% placement capacity under listing rule 7.1A (if applicable)? Answer this question if the response to Q6.1 is “No” and the response to Q6.2 is “No”. No 6.2c.1 *How many +securities are being issued without +security holder approval using the entity’s additional 10% placement capacity under listing rule 7.1A? Answer this question if the response to Q6.1 is “No”, the response to Q6.2 is “No” and the response to Q6.2c is “Yes”. Please complete and separately send by email to your ASX listings adviser a work sheet in the form of Annexure C to Guidance Note 21 confirming the entity has the available capacity under listing rule 7.1A to issue that number of securities. N/A Introduced 01/12/19; amended 31/01/20 Exception 13 is only available if and to the extent that the number of +equity securities issued under the scheme does not exceed the maximum number set out in the entity’s prospectus, PDS or information memorandum (in the case of (a) above) or in the notice of meeting (in the case of (b) above). Exception 13 ceases to be available if there is a material change to the terms of the scheme from those set out in the entity’s prospectus, PDS or information memorandum (in the case of (a) above) or in the notice of meeting (in the case of (b) above).