<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2025-04-24</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0002012318</issuerCik>
        <issuerName>Inflection Point Acquisition Corp. III</issuerName>
        <issuerTradingSymbol>IPCX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002012321</rptOwnerCik>
            <rptOwnerName>Inflection Point Holdings III LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O INFLECTION POINT ACQ CORP. III</rptOwnerStreet1>
            <rptOwnerStreet2>167 MADISON AVENUE, SUITE 205 #1017</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10016</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002062185</rptOwnerCik>
            <rptOwnerName>Inflection Point Asset Management LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O INFLECTION POINT ACQ CORP. II</rptOwnerStreet1>
            <rptOwnerStreet2>167 MADISON AVENUE, SUITE 205 #1017</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10016</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001458423</rptOwnerCik>
            <rptOwnerName>BLITZER MICHAEL</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O INFLECTION POINT ACQ CORP. II</rptOwnerStreet1>
            <rptOwnerStreet2>167 MADISON AVENUE, SUITE 205 #1017</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10016</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>See Remarks</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Class B Ordinary Shares, par value $0.0001 per share</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Ordinary Shares, par value $0.0001 per share</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>8433333</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The Class B ordinary shares are convertible for the Issuer's Class A ordinary shares as described under the heading &quot;Description of Securities&quot; in the Issuer's Registration Statement on Form S-1 (File No. 333-283427) (as amended, the &quot;Registration Statement&quot;) and have no expiration date. The Class B ordinary shares beneficially owned by the Reporting Persons include up to 1,100,000 Class B ordinary shares subject to forfeiture to the Issuer depending on the extent to which the underwriters' over-allotment option is exercised in connection with the Issuer's initial public offering of units, as described in the Registration Statement.</footnote>
        <footnote id="F2">Inflection Point Holdings III LLC is the record holder of the securities reported herein. Inflection Point Asset Management LLC is the manager of Inflection Point Holdings III LLC and shares voting and investment discretion with respect to the securities held of record by Inflection Point Holdings III LLC. Michael Blitzer controls Inflection Point Asset Management LLC and shares voting and investment discretion with respect to the securities held of record by Inflection Point Holdings III LLC. Inflection Point Asset Management LLC and Michael Blitzer disclaim any beneficial ownership of the securities held by Inflection Point Holdings III LLC other than to the extent of any pecuniary interest it or he may have therein, directly or indirectly.</footnote>
    </footnotes>

    <remarks>Inflection Point Holdings III LLC and Inflection Point Asset Management LLC may be deemed directors by deputization by virtue of their representation on the board of directors of the Issuer. Michael Blitzer is the chief executive officer and chairman of the board of directors of the Issuer.</remarks>

    <ownerSignature>
        <signatureName>v/s/ Michael Blitzer for Inflection Point Holdings III LLC, Name: Michael Blitzer Title: Chief Investment Officer of Manager</signatureName>
        <signatureDate>2025-04-24</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Michael Blitzer for Inflection Point Asset Management LLC, Name: Michael Blitzer Title: Chief Investment Officer</signatureName>
        <signatureDate>2025-04-24</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Michael Blitzer</signatureName>
        <signatureDate>2025-04-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
