Singer-songwriter Dan Sultan has put the rest of his Australian tour on hold a day after apologising for his “inexcusable and disrespectful” behaviour at a recent Cairns show.

“Dan’s health and wellbeing is our highest priority at this time and we thank you for your ongoing understanding and support,” the management posted on Sultan’s Facebook page.

“We hope to reschedule the postponed dates once Dan makes a full recovery. While we encourage fans to hold onto their tickets which will be valid for entry to the rescheduled shows, the option to secure a refund is also available via the ticketing outlet or venue from which tickets were purchased.”

Sultan was allegedly intoxicated during his performance on Saturday at Tanks Art Centre in Cairns, with commenters describing the gig as a “sad spectacle” and a “train wreck”, where the musician “butchered” his song “My Kingdom”. In a clip posted on social media, Sultan could also be seen singing out of tune and forgetting the lyrics while covering Britney Spears’s “Baby One More Time”.

“I want to apologise to all of my fans, particularly those who were at the Cairns show on Saturday night,” Sultan said on Monday.

“My behaviour was inexcusable and disrespectful. 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.”