An intervention by the Irish Embassy in Mexico City has stopped the transfer of one of the "Colombia Three" from a remand prison to a jail for convicted prisoners, a lawyer for the three men has said.
Mr Agustin Jimenez said Mr Niall Connolly was to be moved from the Model Prison for remand prisoners in the centre of Bogota to the Combita prison for convicted felons, 250 kilometres north of the city.
The three Irishmen are charged with travelling on false passports and helping left-wing FARC guerrillas.
According to Mr Jimenez the decision to move Mr Connolly to Combita was taken on Sunday but was reversed by the action of the embassy in Mexico City which serves Irish interests in Colombia.
Objections were raised on the basis that Mr Connolly has not been convicted.
The trial of the three men ended in November but the judge has yet to deliver his verdict.
Mr Connolly is the only one of the three who speaks Spanish and his departure would, according to Mr Jimenez, leave the other two at an increased disadvantage. In addition, Combita has a bad reputation for violence between prisoners of opposing factions.
Mr Jimenez also expressed concern at the judge's delay in delivering his verdict, saying he feared there was political pressure to hold over the judgment until the end of a UN Human Rights Commission meeting in April.