Abstreiter has represented Germany on thirteen different occasions, both as a junior and as a professional. He has totalled five goals and seven assists in 26 games as a junior and four goals and 17 assists in 48 games as a professional. He last played professionally for Germany at the 2004 World Cup of Hockey, where he went scoreless in four games.Abstreiter played for Germany in a total of six World Championships. Furthermore, he participated in the 2002 Winter Olympics, finishing eighth in the tournament. Abstreiter was also the head coach of team Germany at the 2021 World Juniors. He led Germany to the quarter finals for the first time in history.