The 36-year-old, who had been playing for MLS side Toronto FC, has decided to call time on his career following a battle with a hip injury.
"During pre-season we discovered that my recovery would take longer than expected. I always want to do what's best for the team and that is why I have decided to step away," he said in a statement.
"I really enjoyed my time in Toronto and playing for Toronto FC. I wish the club all the best this season and hopefully they can continue to embrace the winning spirit that I brought to the team."
Having played for the likes of Bayern Munich and Borussia Dortmund, midfielder Frings also made 79 appearances at international level for Germany.