Marchand first competed internationally for the 2005 World U-17 Hockey Challenge, winning a bronze medal with Team Canada Atlantic. As a prospect, Marchand went on to represent Canada twice at the IIHF World Junior Championship: the 2007 WJC in Sweden, and again at the 2008 WJC in the Czech Republic. Both times, Canada took home a gold medal. After his performance in the 2007 World Juniors, Marchand was named one of four alternate captains for Canada in the 2008 tournament.