 He continued to be called up by the U18s in 2015, earning an invite to the first camp of the year in Bosnia and Herzegovina in April, as well as the NTC Invitational Tournament in July.Swanson earned 15 caps for the U18s while eligible to play for the team.Swanson earned his first call-up to the U20s in August 2015, as he was selected to take part in the Stevan Vilotić-Cele Tournament.