In 2016, Wigginton helped lead Team Canada to a silver medal at the FIBA Americas Under-18 Championship in Valdivia, Chile and played a crucial role in Canada’s run to gold at the 2017 FIBA Under-19 World Cup in Cairo, Egypt, as he averaged 12.4 points, 7.0 rebounds and 4.2 assists per game during the tournament. He missed the quarter and semi final due to concussive symptoms, but was back for the championship game against Italy, scoring eleven points while tallying three rebounds and three assists.