Bobby Brown canceled his scheduled appearance at the Charleston Jam Fest concert in South Carolina this weekend.
Us Weekly said the still-grieving singer backed out of Friday's job after the results of his daughter Bobbi Kristina Brown's autopsy were released to the public.
"Bobby Brown will not be performing due to illness," read posters on the doors of the North Charleston Coliseum. "Refund requests must be prior to entry only!"
The R&B star was to perform alongside Keith Sweat, Jagged Edge and 112.
Documents released by the medical examiner's office late last week showed Bobbi Kristina died in 2015 at the age of 22 of a combination of drowning and drug intoxication. She was found unresponsive in her bathtub and placed on life support for months before dying in hospice care in June.
The circumstances of her death remain under investigation.
Bobbi Kristina was Brown's only child with his ex-wife Whitney Houston, who drowned in a bathtub in 2012 after ingesting drugs and alcohol. She was 48.