The Borussia Monchengladbach keeper is rumoured to be a target for the Camp Nou club as they seek to find a replacement for Victor Valdes, who is set to depart at the end of the season.
However, while praising his international team-mate's abilities between the posts, Neuer questioned whether he is ready to make the move to a club of Barcelona's stature.
"There is no doubt about it that Ter Stegen is a great goalkeeper," he told AS. "He is a player with a big future ahead of him.
"He is sensational. He is very agile and always knows how to deal with complicated situations. He is a superb shot-stopper.
"I don't know whether he's ready to play for a team like Barcelona yet. That's a decision their technical staff will have to make."
Get the best features, fun and footballing frolics straight to your inbox every week.
Thank you for signing up to Four Four Two. You will receive a verification email shortly.
There was a problem. Please refresh the page and try again.