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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 GwrgHt1FBwBxPeS7Bj8E0g==

<SEC-DOCUMENT>0000900331-04-000001.txt : 20040102
<SEC-HEADER>0000900331-04-000001.hdr.sgml : 20040101
<ACCEPTANCE-DATETIME>20040102150540
ACCESSION NUMBER:		0000900331-04-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031231
FILED AS OF DATE:		20040102

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SPECIAL SITUATIONS FUND III L P
		CENTRAL INDEX KEY:			0000914248
		IRS NUMBER:				133737427
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		153 E 53 ST 51ST FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		2128325300

	MAIL ADDRESS:	
		STREET 1:		153 EAST 53RD STREET 51ST FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MARXE AUSTIN W
		CENTRAL INDEX KEY:			0000900331

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-08110
		FILM NUMBER:		04501133

	BUSINESS ADDRESS:	
		STREET 1:		C/O SPECIAL SITUATIONS FUND III LP
		STREET 2:		153 E 53RD ST 51ST FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		2128325300

	MAIL ADDRESS:	
		STREET 1:		C/O SPECIAL SITUATIONS FUND III LP
		STREET 2:		153 E 53RD ST 51ST FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2003-12-31</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000914248</issuerCik>
        <issuerName>SPECIAL SITUATIONS FUND III L P</issuerName>
        <issuerTradingSymbol>N/A</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000900331</rptOwnerCik>
            <rptOwnerName>MARXE AUSTIN W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SPECIAL SITUATIONS FUND III LP</rptOwnerStreet1>
            <rptOwnerStreet2>153 E 53RD ST 55TH FL</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Affiliate of Investment Advise</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>

        <nonDerivativeTransaction>
            <securityTitle>
                <value>Units of Limited Partnership Interest</value>
            </securityTitle>
            <transactionDate>
                <value>2003-12-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>80</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>25000</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>830.02</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Affiliate of Investment Adviser</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The number of units owned is estimated.  Mr. Marxe owns 51% (approximately 560.39 units of limited partnership interest)of MGP Advisers Limited Partnership, the investment adviser to the Special Situations Fund III, L.P.  Mr. Marxe also owns an estimated 269.63 units directly.  The number of units owned is calculated based on performance allocation which can only be estimated at this time.</footnote>
    </footnotes>


    <ownerSignature>
        <signatureName>Austin W. Marxe</signatureName>
        <signatureDate>2004-01-02</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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