Tayto Park will NOT reopen on June 18th.
Earlier, management had said the theme park in Co Meath would be ready to welcome back guests from Thursday week.
It had said it would only open at 10% of the usual capacity.
However, after reviewing regulations that were published yesterday it's been decided they will stay closed.
Anyone who had booked a ticket to enter the park from June 18th will be issued a refund.
Ray Coyle of Tayto Park said: “We’re terribly sorry, particularly given the huge amount of excitement and support we received this morning from everyone. Myself and the entire team look forward to welcoming everyone when regulations allow”.