Oliver Heldens has cancelled his gig at Belfast's Custom House Square next week.
The Dutch DJ was set to appear at the city centre venue on Sunday, August 20 as part of a series of gigs over the next few weeks.
In a statement, organisers said Heldens was unable to perform due to "scheduling difficulties".
They added: "We regret to announce that Oliver Heldens will be unable to perform at CHSq on August 20th.
"A new Belfast date in Winter 2017 will be announced in due course.
"Refunds for the August 20th event are available from point of purchase. CHSq & Oliver Heldens would like to apologise for any inconvenience caused."
The Custom House Square gigs are set to kick off on Friday, August 11 with Above And Beyond, followed by Irish band Walking On Cars on Saturday, August 12.
Emelie Sande, Foy Vance, Kasabian, Ocean Colour Scene, Timmy Trumpet, Carl Cox, and Stiff Little Fingers will also perform headline sets.