Willie Nelson fans got a bit of a disappointment after the 86-year-old singer canceled his tour.

Nelson was  supposed to play Forest Hills Stadium in Queens Sept. 11.

He canceled his tour because of a "breathing problem" that he says needs to be checked out by a doctor.

He apologized on Twitter late Wednesday night saying  "I'll be back"  

Nelson had just finished performing in Toledo, Ohio, and he was scheduled to play Friday in Grand Rapids, Michigan.