Šarić also played with Croatia's Under-19 national team in the 2011 FIBA Under-19 World Cup, where he finished fourth in scoring (18.1 ppg) and third in rebounds (10.1 rpg), despite being one of the youngest participants at 17 years of age. He also played at the 2013 FIBA Under-19 World Cup, where he averaged 20.3 points, 11.2 rebounds, 4.9 assists per game, and was named to the All-Tournament Team.