The Independent TD Shane Ross has declared that he is calling for a no vote in the Fiscal Treaty referendum.
Writing in today's Sunday Independent, Deputy Ross said he would reject the Treaty as a means of postponement, until the situation in Europe and the implications of the Greek crisis become clearer.
"If the vote is postponed or if we have a chance at a second vote, we'll have a clear picture of what's happening in Greece and France, and of what the (EU) growth pact contains," he said.
"At the moment we're being asked to vote in a vacuum…and I think that's totally unreasonable."
Deputy Ross' comments come as the Taoiseach Enda Kenny prepares to make a four-minute televised address on the Fiscal Treaty this evening, at 5.50pm, on RTE 1.
His address can only be four minutes long, to match the time for which Sinn Féin president Gerry Adams spoke on the treaty during his televised speech last night at the Sinn Fein Ard Fheis.
Meanwhile, three new opinion polls out this morning show the yes side has a strong lead over the no side, with just four days to go to polling day on Thursday.
However the surveys in the Sunday Times, Sunday Independent and Sunday Business Post also reveal that a large number undecided voters could still tip the balance and result in rejection of the treaty.
The Sunday Business Post poll shows that support for a yes vote is at 49% while support for a no vote is at 35%.
It also shows that 4% of voters have switched from the yes to the no camp within the last week.
The paper's political editor Pat Leahy said: "There is a very committed core of no voters and they always turn out to vote against European treaties, but that tends not to be much more than 25% or 30% of the turnout on the day.
"What the no side needs to do is to convince soft yes voters and undecided voters to come to them. That process has started."