The prime minister has insisted the government will make a "significant contribution" to the redevelopment of Casement Park.
Rishi Sunak refused to say how much more money the government would be willing to put up or if it would happen in time for Euro 2028.
He was asked about the issue by BBC News NI during a visit to Belfast on Friday.
The PM also said ongoing discussions meant he would not say when exactly the government will make further details public.
However, he added he would ensure there would be a "great legacy for Northern Ireland" in the Euros.
Chris Heaton-Harris and Rishi Sunak took a trip on a zero-emission electric boat during a visit to Belfast's Titanic Quarter
Northern Ireland is due to host five games in the football championships at Casement Park in west Belfast.
But the stadium site remains derelict and redevelopment work has yet to begin.
At the weekend, the Irish FA and the GAA sent a joint letter to the prime minister urging him to clarify the funding for the project.
But the cost of the redevelopment could be more than £300m and the PM would not say whether funding will be confirmed before July's general election.
Rishi Sunak refused to say how much more money the government would be willing to put up or if it would happen in time for Euro 2028.
He was asked about the issue by BBC News NI during a visit to Belfast on Friday.
The PM also said ongoing discussions meant he would not say when exactly the government will make further details public.
However, he added he would ensure there would be a "great legacy for Northern Ireland" in the Euros.
Chris Heaton-Harris and Rishi Sunak took a trip on a zero-emission electric boat during a visit to Belfast's Titanic Quarter
Northern Ireland is due to host five games in the football championships at Casement Park in west Belfast.
But the stadium site remains derelict and redevelopment work has yet to begin.
At the weekend, the Irish FA and the GAA sent a joint letter to the prime minister urging him to clarify the funding for the project.
But the cost of the redevelopment could be more than £300m and the PM would not say whether funding will be confirmed before July's general election.