Hospelt has represented Germany's national team on numerous occasions. Twice (in 2002 and 2003) he played for Team Germany in the IIHF World U18 Championships. Three times (in 2003, 2004, and 2005) he represented them in the World Junior Championships. Six times (in 2009, 2010, 2011, 2012, 2014, 2015) he suited up for the national team in the World Championships. The largest honour came in 2010, when he suited up in the Olympic Games in Vancouver in 2010 and score one assist in four games as Germany fell in the qualification round. Having won 115 caps for the German men's national team, he announced his retirement from international ice hockey in July 2017.
