http://tvline.com/2016/04/28/sara-ramirez-leaving-greys-anatomy-season-13-abc-callie/

Ramirez, whose contract is up in June, has Grey's fans worried with Wednesday's tweet saying "That's a wrap for Doctor #CallieTorres #Season13 #GreysAnatomy #ThankYou all for an enriching & unforgettable #Rollercoaster ride!” The tweet, though, could be part of her negotiations for a new contract.

On the show, her character is talking about following her girlfriend across the country so it's possible she could be leaving the show.

"Grey's Anatomy" Star Leaves after 10-Years
May 19, 2016
by Lesley Goldberg


The doctor is out. "Grey's Anatomy" fan favorite Sara Ramirez, who has played Dr. Callie Torres since season two, has exited the Shondaland medical drama.

"I'm deeply grateful to have spent the last 10 years with my family at Grey's Anatomy and ABC but for now I'm taking some welcome time off," Ramirez said in a statement. "Shonda's been so incredible to work for and we will definitely continue our conversations! I send my love to Ellen [Pompeo], the rest of the cast and crew, and I look forward to always being a part of the Shondaland family!"

Said Rhimes in a statement: "Dr. Callie Torres came into our lives dancing it out in her underwear almost a decade ago and I could not be happier or more proud of her journey. Sara Ramirez's performance inspired me as well as millions of fans each week. We wish her the best on her well-deserved time off. I will miss Callie tremendously, but am excited for what the future holds for Sara. She will always have a home at Shondaland."

http://www.hollywoodreporter.com/live-feed/greys-anatomy-sara-ramirez-exits-895883

Didn't the character decide to stay in Chicago because of her daughter?

23 Reasons Callie Torres Is The Best Part Of "Grey's Anatomy" (https://www.buzzfeed.com/jemimaskelley/cant-pray-away-the-gay)

This May Explain Why Callie Torres' Departure On "Grey's Anatomy" Seemed Out Of The Blue (https://www.buzzfeed.com/tahliapritchard/this-makes-more-sense)