The Keeping Up With the Kardashians star's dad, Jeffrey Disick, 63, died Friday in Los Angeles. No other details about his passing have been revealed.
"The whole family is so devastated and Scott is beside himself," a source said. "Scott is an only child with no remaining family."
Jeffrey Disick's death comes just two months after his wife, Bonnie, died in late October. Scott Disick and his partner, Kourtney Kardashian, spent time in the Dominican Republic shortly after she died to recuperate.
Scott Disick and Kardashian have two children together, Mason, 3, and Penelope, 1.