Exhibit 99.3

MOUNTAIN PROVINCE DIAMONDS INC. Security Class Holder Account Number ------- Fold Form of Proxy - Special Meeting to be held on April 9, 2018 This Form of Proxy is solicited by and on behalf of Management. Notes to proxy 1. Every holder has the right to appoint some other person or company of their choice, who need not be a holder, to attend and act on their behalf at the meeting or any adjournment or postponement thereof. If you wish to appoint a person or company other than the persons whose names are printed herein, please insert the name of your chosen proxyholder in the space provided and strike out the names of the Management Nominees (see reverse). 2. If the securities are registered in the name of more than one owner (for example, joint ownership, trustees, executors, etc.), then all those registered should sign this proxy. If you are voting on behalf of a corporation or another individual you must sign this proxy with signing capacity stated, and you may be required to provide documentation evidencing your power to sign this proxy. 3. This proxy should be signed in the exact manner as the name(s) appear(s) on the proxy. 4. If this proxy is not dated, it will be deemed to bear the date on which it is mailed by Management to the holder. 5. The securities represented by this proxy will be voted as directed by the holder, however, if such a direction is not made in respect of any matter, this proxy will be voted as recommended by Management. 6. The securities represented by this proxy will be voted in favour or withheld from voting or voted against each of the matters described herein, as applicable, in accordance with the instructions of the holder, on any ballot that may be called for and, if the holder has specified a choice with respect to any matter to be acted on, the securities will be voted accordingly. 7. This proxy confers discretionary authority in respect of amendments or variations to matters identified in the Notice of Meeting or other matters that may properly come before the meeting or any adjournment or postponement thereof. 8. This proxy should be read in conjunction with the accompanying documentation provided by Management. ------- Fold Proxies submitted must be received by 2:30 p.m., Vancouver time, on April 5, 2018. VOTE USING THE TELEPHONE OR INTERNET 24 HOURS A DAY 7 DAYS A WEEK! To Vote Using the Telephone • Call the number listed BELOW from a touch tone telephone. 1-866-732-VOTE (8683) Toll Free To Vote Using the Internet • Go to the following web site: www.investorvote.com • Smartphone? Scan the QR code to vote now. If you vote by telephone or the Internet, DO NOT mail back this proxy. Voting by mail may be the only method for securities held in the name of a corporation or securities being voted on behalf of another individual. Voting by mail or by Internet are the only methods by which a holder may appoint a person as proxyholder other than the Management nominees named on the reverse of this proxy. Instead of mailing this proxy, you may choose one of the two voting methods outlined above to vote this proxy. To vote by telephone or the Internet, you will need to provide your CONTROL NUMBER listed below. CONTROL NUMBER

 

Appointment of Proxyholder I/We, being holder(s) of Mountain Province Diamonds Inc. ("Mountain OR Print the name of the person you are Province") hereby appoint: David Whittle or, failing him, Perry Ing, appointing if this person is someone other than the Management Nominees listed herein. as my/our proxyholder with full power of substitution and to attend, act and to vote for and on behalf of the shareholder in accordance with the following direction (or if no directions have been given, as the proxyholder sees fit) and all other matters that may properly come before the Special Meeting of shareholders of Mountain Province to be held at Terminal City Club, 837 West Hastings Street, Vancouver, British Columbia, Canada V6C 1B4 on Monday, April 9, 2018 at 2:30 p.m. (Vancouver time) and at any adjournment or postponement thereof. VOTING RECOMMENDATIONS ARE INDICATED BY HIGHLIGHTED TEXT OVER THE BOXES. For Against 1. Plan of Arrangement To consider and, if deemed advisable, to pass, with or without variation, an ordinary resolution, the full text of which is set out in Schedule "B" – "Resolutions to be Approved at the Mountain Province Meeting" to the accompanying joint management information circular dated March 5, 2018 (the "Circular"), to authorize and approve the issuance of up to 54,673,383 common shares of Mountain Province in connection with the proposed plan of arrangement under the Business Corporations Act (Ontario) to be completed pursuant to the terms and subject to the conditions of the arrangement agreement dated January 28, 2018 between Mountain Province and Kennady Diamonds Inc. (as may be modified or amended in accordance with its terms), all as more particularly described in the Circular. ------- Fold ------- Fold Authorized Signature(s) - This section must be completed for your Signature(s) Date instructions to be executed. I/We authorize you to act in accordance with my/our instructions set out above. I/We hereby revoke any proxy previously given with respect to the Meeting. If no voting instructions are indicated above, this Proxy will be voted as recommended by Management. M P V Q 2 6 7 8 8 4 A R 0

MOUNTAIN PROVINCE DIAMONDS INC. Security Class Holder Account Number ------- Fold Form of Proxy - Special Meeting to be held on April 9, 2018 This Form of Proxy is solicited by and on behalf of Management. Notes to proxy 1. Every holder has the right to appoint some other person or company of their choice, who need not be a holder, to attend and act on their behalf at the meeting or any adjournment or postponement thereof. If you wish to appoint a person or company other than the persons whose names are printed herein, please insert the name of your chosen proxyholder in the space provided and strike out the names of the Management Nominees (see reverse). 2. If the securities are registered in the name of more than one owner (for example, joint ownership, trustees, executors, etc.), then all those registered should sign this proxy. If you are voting on behalf of a corporation or another individual you must sign this proxy with signing capacity stated, and you may be required to provide documentation evidencing your power to sign this proxy. 3. This proxy should be signed in the exact manner as the name(s) appear(s) on the proxy. 4. If this proxy is not dated, it will be deemed to bear the date on which it is mailed by Management to the holder. 5. The securities represented by this proxy will be voted as directed by the holder, however, if such a direction is not made in respect of any matter, this proxy will be voted as recommended by Management. 6. The securities represented by this proxy will be voted in favour or withheld from voting or voted against each of the matters described herein, as applicable, in accordance with the instructions of the holder, on any ballot that may be called for and, if the holder has specified a choice with respect to any matter to be acted on, the securities will be voted accordingly. 7. This proxy confers discretionary authority in respect of amendments or variations to matters identified in the Notice of Meeting or other matters that may properly come before the meeting or any adjournment or postponement thereof. 8. This proxy should be read in conjunction with the accompanying documentation provided by Management. ------- Fold Proxies submitted must be received by 2:30 p.m., Vancouver time, on April 5, 2018. VOTE USING THE TELEPHONE OR INTERNET 24 HOURS A DAY 7 DAYS A WEEK! To Vote Using the Telephone • Call the number listed BELOW from a touch tone telephone. 312-588-4290 Direct Dial To Vote Using the Internet • Go to the following web site: www.investorvote.com • Smartphone? Scan the QR code to vote now. If you vote by telephone or the Internet, DO NOT mail back this proxy. Voting by mail may be the only method for securities held in the name of a corporation or securities being voted on behalf of another individual. Voting by mail or by Internet are the only methods by which a holder may appoint a person as proxyholder other than the Management nominees named on the reverse of this proxy. Instead of mailing this proxy, you may choose one of the two voting methods outlined above to vote this proxy. To vote by telephone or the Internet, you will need to provide your CONTROL NUMBER listed below. CONTROL NUMBER

Appointment of Proxyholder I/We, being holder(s) of Mountain Province Diamonds Inc. ("Mountain OR Print the name of the person you are Province") hereby appoint: David Whittle or, failing him, Perry Ing, appointing if this person is someone other than the Management Nominees listed herein. as my/our proxyholder with full power of substitution and to attend, act and to vote for and on behalf of the shareholder in accordance with the following direction (or if no directions have been given, as the proxyholder sees fit) and all other matters that may properly come before the Special Meeting of shareholders of Mountain Province to be held at Terminal City Club, 837 West Hastings Street, Vancouver, British Columbia, Canada V6C 1B4 on Monday, April 9, 2018 at 2:30 p.m. (Vancouver time) and at any adjournment or postponement thereof. VOTING RECOMMENDATIONS ARE INDICATED BY HIGHLIGHTED TEXT OVER THE BOXES. For Against 1. Plan of Arrangement To consider and, if deemed advisable, to pass, with or without variation, an ordinary resolution, the full text of which is set out in Schedule "B" – "Resolutions to be Approved at the Mountain Province Meeting" to the accompanying joint management information circular dated March 5, 2018 (the "Circular"), to authorize and approve the issuance of up to 54,673,383 common shares of Mountain Province in connection with the proposed plan of arrangement under the Business Corporations Act (Ontario) to be completed pursuant to the terms and subject to the conditions of the arrangement agreement dated January 28, 2018 between Mountain Province and Kennady Diamonds Inc. (as may be modified or amended in accordance with its terms), all as more particularly described in the Circular. ------- Fold ------- Fold Authorized Signature(s) - This section must be completed for your Signature(s) Date instructions to be executed. I/We authorize you to act in accordance with my/our instructions set out above. I/We hereby revoke any proxy previously given with respect to the Meeting. If no voting instructions are indicated above, this Proxy will be voted as recommended by Management. M P V Q 2 6 7 8 8 4 A R 0