Green Party TD Neasa Hourigan has been suspended from the parliamentary party for voting against the Government.
It comes after the Government won a Dáil vote opposing the Sinn Féin motion seeking to halt lifting the eviction ban, with 83 voting with the Coalition and 68 against.
The Dublin Central TD has lost the party whip and been suspended for 15 months. She will also lose her Oireachtas committee positions.
In a statement, the Green Party said that it will be open to her to apply for readmission after this period.
"The parliamentary party regrets having to take these steps but believes that effectiveness in Government relies on unity in every vote," the party said.
As she left Leinster House, Ms Hourigan said she was "not in a good headspace" and would make no further comment.
There were four Dáil votes arising from Sinn Féin's attempt to get a majority of TDs to vote against ending of the eviction ban in nine days.
The first vote saw the proposals put forward by the Regional Independent Group to ease the housing crisis voted on.
With the backing of the Government, these proposals got the support of 93 TDs with 68 voting against.
A call by Aontú leader Peadar Tóibín to keep the evictions ban in place for those with severe illness was defeated following a roll call vote.
The big question was the Government's response to the Sinn Féin motion. A total of 83 TDs voted with the Government and 68 opposed.
Green Party TD Patrick Costello voted with the Government on all occasions.
It means that a Dáil majority has given its backing in this largely symbolic vote to lifting the evictions ban at the end of the month.
Labour will lodge a no-confidence motion in the Government. The Dáil Business Committee will then decide when it is debated and voted on. It could happen next Tuesday afternoon.
If homeless figures surge, Govt win will count for little
Speaking before the Dáil vote, Labour's Finance Spokesperson Ged Nash asked how much it will cost the taxpayer for the Government to secure the votes of the Regional Independent TDs.
His question was ruled out of order by the Ceann Comhairle.
A 'pyrrhic victory'
Speaking to the Sinn Féin parliamentary group meeting, party leader Mary Lou McDonald said that the Government "may have won their vote this evening, but they have categorically lost the argument".
"It is pyrrhic victory," she said.
"The consequences of their actions for workers and families will be catastrophic. Government and Independent TDs voted to make more people homeless. It is a despicable decision."
In a statement, Labour leader Ivana Bacik said that "Government TDs' vote in the Dáil today has confirmed what we already know: they do not have renters’ interests at heart, and they do not understand the magnitude of the social disaster we face due to homelessness and the lifting of the eviction ban".
"Families facing a cliff edge from 1 April have no safety net in place," she said.
"Hastily announced measures from Government this week will do nothing for those who will lose their home at the end of this week. There is no emergency accommodation available."
Independent TD for the Roscommon–Galway constituency, Denis Naughten told RTÉ News that he and some of his fellow Regional Independent Group TDs voted with the Government because they accepted eight proposals that he said would make a real impact.
He said these proposals would provide accommodation for people who are threatened with eviction, tax relief for small landlords and also affordable housing for young couples.
Mr Naughten said one of their proposals adopted by Government is that if an older person in long-term nursing home care rents out their home, they will not be penalised, like present, and if someone on social welfare rents out a room, they will not be penalised.
He said the measures would make a real difference and would increase the number of houses available to rent in the short term.
'Onslaught of evictions'
Housing charity Threshold has implored the Government to reinstate the ban as what it calls an "onslaught of evictions" will be expected in the coming months
It said that record numbers of adults and children could be facing homelessness as a result of the Government's majority vote.
Threshold CEO John-Mark McCafferty said that the organisation currently works with thousands of individuals with notices of termination, and the Coalition’s decision is likely to exacerbate the concerns - and situations - these renters find themselves in.
Homeless charity Depaul said the focus now "must firmly centre on the availability of temporary accommodation in each local authority area" and the efficient implementation of Government measures.
In a statement after the vote, the charity’s chief executive David Carroll said: "We strongly support the momentum that is there to overturn the ban, however, as one of the major frontline service providers working in temporary accommodation, our focus continues to be on the response and on our ability to support those who come through our doors.
"Temporary accommodation or the streets should not be seen as the inevitable destination for those facing eviction."
The Irish Property Owners' Association welcomed the final result, saying the eviction ban was always an inadequate policy response.
It said that four versions of it have been in existence over the past number of years, and it has, it claims, had no discernible impact on homelessness figures.
The association added that amendments to the Government counter-motion were particularly welcome by it and represent the first meaningful effort by politicians to recognise the strategic importance of landlords in solving the rental crisis.
Additional reporting Mícheál Lehane, David Murphy, Eoin Ó Catháin
