Mr Sultan was due to perform at Wagga Civic Theatre on Friday, June 8 and the announcement follows his "inexcusable and disrespectful" behaviour at his show in Cairns on the weekend. 

The Civic Theatre released a statement on social media stating it will process automatic refunds for all ticket holders for the show.

“We hope that Dan will reschedule his concert to a future date and will actively work with his management to make this happen,” the statement read. 

“We also offer our sincere well wishes for a full recovery.” 

In a post to Mr Sultan’s Facebook page, his management team said the reason behind the decision was “ in light of current circumstances”. 

“We apologise to Dan’s fans for any inconvenience this may cause,” the statement read. 

“Dan’s health and wellbeing is our highest priority at this time and we thank you for your ongoing understanding and support.”

Mr Sultan took to social media on Monday afternoon following his Saturday night show at Cairns. 

“I want to apologise to all of my fans, particularly those who were at the Cairns show on Saturday night. My behaviour was inexcusable and disrespectful," he said.

"I’d also like to extend an apology to the staff at Tanks Arts Centre for what occurred. I am taking stock of my personal situation and am seeking professional help.”

Fairfax reported fans took to social media after the performance to express their disappointment at Mr Sultan's performance, saying the singer-songwriter was "rambling" and falling off his stool.

"Can’t begin to tell you how sad we feel, we’ve just walked out of your gig at The Tanks in Cairns. Your last gig here was one of the best gigs we’ve ever seen, but tonight was like watching a train wreck," Frank Dangelico wrote on Facebook.

"Don’t know what’s going on in your life, but to watch you fall off your stool, sing way off and clearly have no idea about how terrible your performance was, is just so profoundly disappointing and disrespectful to us as an audience and to your own professionalism and talent.

"Please get some help Dan, you are so much better than what you showed us tonight."