Lorbek was also a member of the senior men's Slovenian national basketball team. With Slovenia's senior national team, he played at the 2005, 2007, 2009, and 2011 editions of the FIBA EuroBasket. He was one of the top players of the 2009 tournament, and earned the power forward position in the All-Tournament Team. In 2011, Lorbek said that he didn't want to play for the Slovenian national team at EuroBasket 2011, just 15 minutes before Slovenia's training camp started. Two days later, he changed his mind, and decided instead to represent Slovenia at the tournament, which was held in Lithuania.