TV Guide reports that the Millionaire Matchmaker host will appear in one episode of the show.
She will play a famous and "brutally honest" dating show expert who sues Teri (Margaret Cho) for slander.
"I can't wait to go head-to-head with Margaret Cho," Stanger said. "I love, love her. But watch out, lady, I'm bringing you down! Oh, and while I'm on set maybe I can do a little matchmaking!"
The third season of Drop Dead Diva is also expected to feature guest appearances from stars including Kathy Griffin, Clay Aiken, Lance Bass, Wanda Sykes, Tony Goldwyn and LeAnn Rimes.
The show will return on June 19 on Lifetime.