Hamwi was a part of the Syrian U-19 national team that finished in Fourth place at the AFC U-19 Championship 2004 in Malaysia and he was a part of the Syrian U-20 national team at the FIFA U-20 World Cup 2005 in the Netherlands. He plays against Italy and Colombia in the group-stage of the FIFA U-20 World Cup and against Brazil in the Round of 16. He scored one goal against Italy in the second match of the group-stage.