Demirbay accepted a callup to the Turkey national football team on 17 May 2017, for a 2018 FIFA World Cup qualification against Kosovo, but rescinded the offer. Later in the same day, Demirbay accepted a callup to the Germany national team for the friendly against Denmark on 6 June 2017, for the 2018 World Cup qualification match against San Marino on 10 June 2017 and for the 2017 Confederations Cup to be held from 17 June to 2 July 2017.