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Iker Muniain made 59 appearances for Spain at the youth level. He played for Spain at the Under-17, Under-18, Under-19, Under-20, and Under-21 levels. He made his debut for Spain's Under-17 team in 2008 and his final appearance for Spain's Under-21 team in 2015. He helped Spain win the 2012 UEFA European Under-19 Championship and the 2013 FIFA U-20 World Cup.