Leitmannstetter was born and brought up in
Maitenbeth,
Germany and started playing golf very early. At the age of one and a half, he picked up the club for the first time. He represented the
German national team in the years of 2010 and 2011. As an amateur he won the Hellenic Amateur Championship in 2009 and reached the semi-finals of the
Boys Amateur Championship in 2010, losing to the eventual winner,
Adrián Otaegui. ==Professional career==