The fixture has been embroiled in controversy since the two teams were drawn to play each other in Group B3. A team meeting took place on Friday for players to air their views on Sunday's game and the return fixture in Serbia. The players were expected to release a statement at Saturday's news conference, but the delay has added further uncertainty.
The news conference, scheduled to take place at the stadium, is now set to be staged at the team hotel. This change of venue has sparked further speculation about the team's stance on the game. The Republic of Ireland have faced calls to withdraw from the games because of the ongoing Israel-Gaza war, with a "Stop The Game" campaign organised by the pressure group Irish Sport for Palestine gathering pace.
Former Republic of Ireland manager Brian Kerr and ex-international James McClean are among those to have backed calls for a boycott. However, there are also Irish supporters who have always believed that the match should be played with supporters in attendance. The delay has added to the uncertainty surrounding the game, with some reports suggesting that at least one player wishes to withdraw from the squad.
The Republic of Ireland are scheduled to meet in Debrecen at 19:45 BST, with the return fixture in Backa Topola, Serbia on 4 October. The team's training session has also been postponed, with no time given for when it might take place. The Uefa Nations League game against Israel is set to take place on Sunday, with the outcome of the news conference and the team's stance on the game still to be determined.