Medina was part of Argentina's U15 squad that won the 2017 South American Championship under manager Diego Placente on home soil, as they defeated Brazil in the final. Two years later, Medina was selected by Pablo Aimar's U17s for the 2019 South American Championship in Peru and the 2019 FIFA World Cup in Brazil. He scored once, versus Paraguay, in seven matches as they won the former competition, prior to featuring three times at the latter; as they reached the round of sixteen.