The case of 24 humanitarian workers, including 27-year-old Irish man Seán Binder, due to go on trial in Greece has been adjourned.
Mr Binder was among those facing serious charges including espionage, human trafficking and membership of a criminal organisation.
He was arrested in Lesbos in 2018 while volunteering for the non-governmental organisation, Emergency Response Centre International.
He could face up to 25 years in jail if convicted. He denies all charges.
Mr Binder was born in Germany and moved to Ireland at the age of five. He spent his childhood in Kerry with his mother, who is German.
In a statement, he said that today's decision is "further proof of the absurdity of this case".
"All we have done is assist people seeking safety at a time of need. After today’s decision, our lives are once again left on hold," Mr Binder added.
"I feel very angry... because we have to wait years more.
"There's no semblance of fair trial," he added, saying that the legal limbo was blocking independent rescue efforts and costing lives at sea.
Amnesty International has called for the case to be dropped, calling it a show trial.
"These trumped-up charges are farcical and should never have resulted in … Seán appearing in court," said Amnesty International Ireland Executive Director Colm O'Gorman.
"Today's adjournment means that having already waited over three years, this ordeal will continue to drag on … leaving [him] in limbo. We call for the Greek authorities to uphold their human rights obligations, and drop the charges," he added.
Human Rights Watch (HRW) has accused Greek authorities of "criminalising rescuers".
"The court ruled that it was not competent to judge this case," defence lawyer Haris Petsikos told media outside the court.
The case was moved to an appeals court as a lawyer is among those accused, Mr Petsikos said.
No date was given for the new trial.
