Sinn Féin has confirmed that the party's TD Sandra McLellan has decided not to contest the next general election.
The Cork East TD posted on Facebook that her efforts as a TD were consistently undermined by a small number of party members locally.
The announcement follows a bitter row in the Sinn Féin organisation in Cork East earlier this year, which resulted in the resignation of dozens of party members.
It centred on the expulsion of Cobh Councillor Kieran McCarthy from the party in June.
The convention to select the party's general election candidate for Cork East is due to take place tomorrow.
Councillor Pat Buckley from Midleton is now likely to be selected to contest the election.