Just two days after the death of her husband, Celine Dion has been dealt another blow: Her brother, Daniel, passed away Saturday morning.

Daniel, 59, had been battling cancer of the throat, tongue and brain. He died in Montreal, surrounded by friends and family, including his 89-year-old mother, at 5 a.m. Saturday.

The singer’s husband, René Angélil, died Thursday after a years-long battle with throat cancer.

Compounding the tragedy, Celine could not be at her brother’s bedside.

“Celine was tending to her husband’s death and comforting their children” in Las Vegas, said a source close to the family.

“So she couldn’t be there. She wanted to be there, and has called continually. She is very overwhelmed,” the source told The Post.

Daniel is survived by his two daughters, two grandchildren, his mother and 13 siblings.

Celine will resume performances in Las Vegas at Caesars Palace on Feb. 23.