The 28-year-old singer and 30-year-old rapper had been together since late 2012, and got engaged in October 2013. The pair welcomed their first child, son Future Zahir, in May, and the breakup comes amid rumors Future was unfaithful.
"He cheated on her. Game over," an insider told Us Weekly.
"She's devastated," a different source added. "Ciara's focus now is the baby."
Ciara released her fifth studio album, Ciara, in July 2013. The record debuted at No. 2 on the Billboard 200, and included the single "Body Party." The song's accompanying music video starred Ciara and Future and told the story of how the couple met. Future last released Honest in April.