-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 P/s5KEoWButAHZLEd7b4vBo82emNM47/9osulP8qz/5CdXpRDowZLEl0rM81Xojs
 brspvyWCyyq5NEYzOET6dA==

<SEC-DOCUMENT>0001462933-09-000001.txt : 20090506
<SEC-HEADER>0001462933-09-000001.hdr.sgml : 20090506
<ACCEPTANCE-DATETIME>20090506092416
ACCESSION NUMBER:		0001462933-09-000001
CONFORMED SUBMISSION TYPE:	D
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
ITEM INFORMATION:		Investment Company Act Section 3(c)
ITEM INFORMATION:		Section 3(c)(7)
FILED AS OF DATE:		20090506
DATE AS OF CHANGE:		20090506
EFFECTIVENESS DATE:		20090506

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TA SUBORDINATED DEBT FUND III, L.P.
		CENTRAL INDEX KEY:			0001462933
		IRS NUMBER:				264727006
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-130704
		FILM NUMBER:		09799773

	BUSINESS ADDRESS:	
		STREET 1:		200 CLARENDON STREET
		STREET 2:		56TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		617-574-6700

	MAIL ADDRESS:	
		STREET 1:		200 CLARENDON STREET
		STREET 2:		56TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
</SEC-HEADER>
<DOCUMENT>
<TYPE>D
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0301</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001462933</cik>
        <entityName>TA SUBORDINATED DEBT FUND III, L.P.</entityName>
        <issuerAddress>
            <street1>200 CLARENDON STREET</street1>
            <street2>56TH FLOOR</street2>
            <city>BOSTON</city>
            <stateOrCountry>MA</stateOrCountry>
            <zipCode>02116</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>617-574-6700</issuerPhoneNumber>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <jurisdictionOfInc>DE</jurisdictionOfInc>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <yetToBeFormed>true</yetToBeFormed>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>GENERAL PARTNER</firstName>
                <middleName></middleName>
                <lastName>TA ASSOCIATES SDF III GP, L.P.</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o TA ASSOCIATES, INC.</street1>
                <street2>200 CLARENDON STREET, 56TH FLOOR</street2>
                <city>BOSTON</city>
                <stateOrCountry>MA</stateOrCountry>
                <zipCode>02116</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>GENERAL PARTNER OF ISSUER</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Private Equity Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
            <item>3C</item>
            <item>3C.7</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2009-04-23</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>370000000</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>45</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse>ANY SALES COMMISSIONS TO BE PAID BY THE ISSUER WILL BE PAID IN CONNECTION WITH SALES MADE OUTSIDE OF THE UNITED STATES.</clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>THE ISSUER'S GENERAL PARTNER OR AN AFFILIATE OF THE ISSUER'S GENERAL PARTNER MAY BE ENTITLED TO RECEIVE A MANAGEMENT FEE IN ACCORDANCE WITH THE ISSUER'S GOVERNING DOCUMENTATION, AS AMENDED FROM TIME TO TIME.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>TA SUBORDINATED DEBT FUND III, L.P.</issuerName>
                <signatureName>THOMAS P. ALBER</signatureName>
                <nameOfSigner>THOMAS P. ALBER</nameOfSigner>
                <signatureTitle>CHIEF FINANCIAL OFFICER OF THE ISSUER'S GENERAL PARTNER</signatureTitle>
                <signatureDate>2009-05-04</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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