Sinn Féin says Fáilte Ireland has shown a 'lack of leadership' after another board member resigned over a foreign trip.
Breege O'Donoghue visited Spain, which is not on the 'green list', over the summer.
Former chairman Michael Cawley stepped down last month after a holiday in Italy, despite the organisation encouraging people to holiday in Ireland.
Sinn Féin's tourism spokesperson, Imelda Munster, says it raises questions about Fáilte Ireland itself: