The German goalkeeper missed Saturday's shock defeat to Alaves, but is back in the squad for Tuesday's Champions League opener at Camp Nou.
Barcelona goalkeeper Marc-Andre ter Stegen is poised to return to action in Tuesday's Champions League opener against Celtic.
Ter Stegen is now Barcelona's first-choice keeper following Claudio Bravo's switch to Manchester City, although he sat out Saturday's shock defeat to Alaves with hamstring trouble.
Dutch international Jasper Cillessen made his Barca debut in his absence but is now expected to drop to the bench for the visit of the Scottish champion.
It means third-choice goalkeeper Jordi Masip joins midfielder Denis Suarez and defenders Jeremy Mathieu and Aleix Vidal in missing out on the matchday 18.