In 2016, da Silva played for Germany at the Albert Schweitzer Tournament, an international U18 tournament in Mannheim, Germany. He averaged seven points, 5.4 rebounds and 1.7 blocks per game and won the gold medal. Later in the year, da Silva averaged 9.5 points and six rebounds per game for Germany at the 2016 FIBA U18 European Championship in Samsun, Turkey, leading his team to a fourth-place finish. He helped Germany to fifth place at the 2017 FIBA Under-19 World Cup in Cairo, averaging 10.3 points and four rebounds per game.