Three children with special needs can't get a place in St Christopher's Special School in Longford for September.
Fine Gael TD Micheál Carrigy also raised the Sacred Heart Primary School in Granard in the Dáil.
He says children can't transfer from the early intervention class to the primary school because there's no space.
Deputy Carrigy says there are shortfalls in the system despite significant investment in special education:
Taoiseach Micheál Martin says the government will try to fix the problem: