 On December 22, 2009, Mesfar was called up to the Algerian Under-23 national team by head coach Azzedine Aït Djoudi for a week long training camp.On December 15, 2010, Mesfar scored two goals against Cameroon's Under-23 team in the opening game of the 2010 UNAF U-23 Tournament, as Algeria went on to win the game 6-1.Won the 2010 UNAF U-23 Tournament with the Algerian team, and finished top scorer of the competition