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

    <schemaVersion>X0607</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2026-04-29</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0002104260</issuerCik>
        <issuerName>West Enclave Merger Corp.</issuerName>
        <issuerTradingSymbol>WENC.U</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002121664</rptOwnerCik>
            <rptOwnerName>Mahuad Quijano Emilio</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>true</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>C/O WEST ENCLAVE MERGER CORP.,</rptOwnerStreet1>
            <rptOwnerStreet2>C. CALDERON DE LA BARCA 22</rptOwnerStreet2>
            <rptOwnerCity>CIUDAD DE MEXICO</rptOwnerCity>
            <rptOwnerNonUSStateTerritory>MEXICO</rptOwnerNonUSStateTerritory>
            <rptOwnerCountry>O5</rptOwnerCountry>
            <rptOwnerZipCode>11540</rptOwnerZipCode>
            <rptOwnerStateDescription>MEXICO</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>Co-Chief Executive Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3833333</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">West Enclave Sponsor LLC (the &quot;sponsor&quot;) is the record holder of the shares reported herein. Mr. Emilio Mahuad and Mr. Adrian Otero control the management of the sponsor, including the exercise of voting and investment discretion with respect to the ordinary shares held of record by the sponsor. Each of Mr. Mahuad and Mr. Otero disclaims any beneficial ownership of any shares held by the sponsor except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F2">Represents 3,833,333 ordinary shares of the Issuer acquired by the sponsor prior to the initial public offer (the &quot;IPO&quot;). including up to 500,000 ordinary shares subject to forfeiture to the extent that the over-allotment option by the underwriters is not exercised in full or in part.</footnote>
    </footnotes>

    <remarks>See Exhibit 24.1 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>/s/ Jason T. Simon, as Attorney-in-Fact</signatureName>
        <signatureDate>2026-04-29</signatureDate>
    </ownerSignature>
</ownershipDocument>