Bennett was scheduled to perform at Sands Bethlehem Event Center on Saturday night. The venue announced Friday the show was postponed.
The announcement says the 90-year-old Bennett has been advised not to travel or perform for "the next few days." It says the Grammy winner sends his regrets and all tickets will be honored for a new date.
Publicist Sylvia Weiner says there isn't a rescheduled date yet but Bennett "looks forward to continuing his performance schedule very soon."
Bennett's 65-year career includes the albums "I Left My Heart in San Francisco" and recent collaborations with Lady Gaga.
He won a Grammy for best traditional pop vocal album last year.