*Club domestic league appearances and goals, correct as of 21:27, 12 July 2021 (UTC) ‡ National team caps and goals, correct as of 21:27, 12 July 2021 (UTC)
Márquez was called up to represent the El Salvador national team at the 2021 CONCACAF Gold Cup.[1] He debuted with the El Salvador national team in a 2–0 Gold Cup win over Guatemala on 11 July 2021, assisting his side's first goal in the 81st minute.[2]