Couturier received his first Ice Hockey World Championships selection in 2015, where he posted three goals and four assists in 10 tournament games and helped take Canada to a gold medal. The following year, while still rehabilitating the shoulder injury that he had sustained during the Stanley Cup playoffs, Couturier represented Team North America at the 2016 World Cup of Hockey. Although Team North America did not advance to the semifinals, Couturier and his teammates were remembered for their speed and aggression during the tournament.