Kadri played for Team Ontario at the 2007 Canada Winter Games, where they won a gold medal. He first represented Canada at the 2007 Ivan Hlinka Memorial Tournament, where the team finished fourth. Kadri was invited to Canada's selection camp for the 2010 World Junior Championships held in Regina, Saskatchewan. After being cut in 2009, Kadri was selected to represent Canada in 2010. In Canada's preliminary round game against the United States, Kadri was one of the players selected for the shootout, scoring on goaltender Jack Campbell to help Canada secure the victory.