Jana Kramer and Michael Caussin — her husband of 15 months — have reportedly split. A source close to the couple shared the news with Entertainment Tonight on Wednesday (Aug. 24).

The unnamed source says that the country singer is "devastated," but that she is "trying to put on a brave face and do what’s best for her daughter." Kramer and Caussin have a nearly 7-month-old daughter named Jolie Rae, who was born in January. Though Kramer is one to share family moments on social media, it's been more than a month (July 6) since she posted a photo of her husband.

Caussin is allegedly being treated in a rehab center, but the reason for his stay has not been disclosed.

The couple — who met on Twitter — married on May 22, 2015. The relationship is 32-year-old Kramer's third marriage and Caussin's first. In 2013, she was briefly engaged to fellow country singer Brantley Gilbert, but the wedding plans were called off in August of that year. She was briefly married to Michael Gambino in 2004 and then to actor Johnathon Schaech in 2010.

The "Circles" singer will appear on Chelsea Handler's Netflix show Chelsea this week. She has yet to comment on the split.

12 Country Breakups We Never Saw Coming

Jana Kramer's New Album Will Offer a Look at Her Family

More From Taste of Country