BornLahir indi Argentina, Zelarayán ismerupakan ofketurunan [[Armenians|ArmenianArmenia]] descentmelalui through his fatherayahnya. HeIa receivedmenerima anundangan invitationuntuk to represent themewakili [[ArmeniaTim nationalnasional footballsepak bola team|Armenia|tim nationalnasional teamArmenia]] inpada Junebulan Juni 2020.<ref>{{cite news |last1=Amirzayan |first1=Krikor |title=L'arméno-argentin Lucas Zelarayan invité en sélection nationale d'Arménie |url=https://www.armenews.com/spip.php?page=article&id_article=26726 |access-date=18 November 2023 |publisher=ArmNews |date=18 Juni 2020 |language=French}}</ref> AfterSetelah acceptingmenerima theundangan invitationtersebut inpada Octoberbulan Oktober 2021,<ref>{{cite news |last1=Ghazanchyan |first1=Siranush |title=Lucas Zelarayán to play for Armenian national team |url=https://en.armradio.am/2021/09/28/lucas-zelarayan-to-play-for-armenian-national-team/ |access-date=18 November 2023 |publisher=Public Radio of Armenia |date=28 September 2021}}</ref> heia mademelakukan hisdebutnya debutuntuk fortim thetersebut teamdalam inhasil aimbang 1–11-1 draw againstmelawan [[IcelandTim nationalnasional footballsepak teambola Islandia|IcelandIslandia]] duringselama thepertandingan kualifikasi [[2022Piala Dunia FIFA World Cup2022]] qualification matches.<ref>{{Cite web|url=https://www.uefa.com/european-qualifiers/match/2030913/|title=Iceland-Armenia | European Qualifiers|website=UEFA.com}}</ref>
OnPada 16 JuneJuni 2023, Zelarayán scoredmencetak hisgol firstinternasional internationalpertamanya goalsdalam in akemenangan 4–2 winatas awayWales dalam tokualifikasi [[WalesKejuaraan nationalEropa football team|Wales]] in [[UEFA Euro 2024]] qualification.<ref>{{cite news |title=Wales 2–4 Armenia: Kieffer Moore sent off in chaotic Euro 2024 qualifier as Wales flounder |url=https://www.skysports.com/football/news/19692/12902359/wales-2-4-armenia-kieffer-moore-sent-off-in-chaotic-euro-2024-qualifier-as-wales-flounder |access-date=18 November 2023 |publisher=Sky Sports |date=17 Juni 2023}}</ref> InDalam thepertandingan reversesebaliknya fixture onpada 18 November, heia nettedmencetak aftergol fivesetelah minuteslima inmenit adalam hasil imbang 1–1 draw.<ref>{{cite news |title=Euro qualifying wrap: Wales now reliant on Croatia slip |url=https://www.rte.ie/sport/soccer/2023/1118/1417226-euro-qualifying-wrap-draw-dents-welsh-automatic-push/ |access-date=18 November 2023 |publisher=RTÉ |date=18 November 2023}}</ref>
