Lawyers for a man accused of being an ISIS recruiter say it is highly likely the Irish authorities have told Jordanian authorities of their suspicions.
As a result, they fear he will be detained and possibly tortured if he is deported to his homeland.
The man, who cannot be identified, arrived in 2000 and withdrew his application for refugee status after securing residency through the birth of his son.
His permit was not renewed after his son returned to the Middle East three years ago, and a judgement on his appeal against a deportation order is due next month.
His lawyers are also trying to get the State to process his original application for asylum because they say it was never refused, merely withdrawn.
GardaĆ believe he is a threat to Ireland's national security because of alleged links to ISIS.
He denies the allegations and fears he will be tortured because of them if he is sent home.
The State claims there is no reason to believe he will be detained if he is deported to Jordan, but his lawyers believe the threat exists by the very nature of the allegations made.
Mr Justice Richard Humphreys will make his judgement at a later date.