He has also represented Italy at international level, having made his test debut against France during the 2022 Six Nations Championship.

[1] Marin signed for Benetton in July 2021 ahead of the 2021–22 United Rugby Championship.

[4] On 14 October 2021, he was selected by Alessandro Troncon to be part of an Italy A 28-man squad for the 2021 end-of-year rugby union internationals.

[5] On 13 January 2022, he was selected by Kieran Crowley to be part of an Italy 33-man squad for the 2022 Six Nations Championship.

[6] On 13 January 2024 he was called in Italy Under 23 squad for test series against IRFU Combined Academies.