Yamal represented the youth sections of the Catalonia national football team from a young age, and was made a captain when he was 11 years old. He was captain throughout his time playing for the under-12, under-14 and under-16 teams.

In November 2022, Yamal scored an impressive solo goal in a match against Castile and León, and later that month he converted a penalty, provided the assist for Catalonia's second goal, and received a red card in a 2–2 draw with Aragon that sent Catalonia through to the "Fase d'Or" of the 2022–23 Spanish regional team championship. Yamal was not called up to the squad for the Fase d'Or in 2023.