It was scheduled to happen Wednesday night.
The rapper is known for his viral song "Slime Examination."
Before the cancellation, the United Center had changed its bag policy, not allowing bags of any size inside the arena.
The arena shared the following statement:
"The United Center has made the decision to cancel the NBA YoungBoy show scheduled for Wednesday, September 24 in Chicago. If you purchased through Ticketmaster, refunds will be issued automatically. If you purchased from a third-party reseller, please reach out to your point of purchase."