 He made his under-21 debut in an April 2003 friendly match, and played an additional friendly game for the team in August that year.Danish national team coach Morten Olsen considered including Rasmussen in the squad for the 2010 FIFA World Cup qualification games against Portugal and Albania in September 2009, but chose Kim Christensen from IFK Göteborg instead.In January 2010, he was called up for the Denmark League XI national football team to replace the injured Stephan Andersen, playing one unofficial national team game for the team.