After playing in two games for the Checkers, Roy returned to his hometown of Amos to spend his summer training with kinesiologist Josianne Domingue. He eventually returned to the QMJHL for the 2016–17 season to complete his major junior career. In his final season, Roy was again named to the QMJHL First All-Star Team and received the league's Guy Carbonneau Trophy. As a result of his academic success while attending Cégep de Chicoutimi, he was also a finalist for the Marcel Robert Trophy, an award given to the best student-athlete in the QMJHL. He also competed with Team Canada at the 2017 World Junior Ice Hockey Championships where he helped them win a silver medal.