The championship will now take place in 2021.
The World Swimming Championships - scheduled for December in Abu Dhabi - have been put back 12 months due to the coronavirus pandemic.
The sport's world governing body Fina announced the short-course championships will now take place between December 13th and 18th in 2021.
Irish swimmers such as Darragh Greene, Mona McSharry and Shane Ryan would have been hoping to compete at the event.
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