Mary Lou McDonald, leader of Sinn Féin, has ruled herself out of contesting the Irish presidential election and said her immediate focus must be on leading the party from opposition.

In an interview on RTÉ's Morning Ireland, Ms. McDonald said her name was "no longer in the mix" and that her effort "at this point in time" has to be on "holding this government to account day and daily, building with my Sinn Féin colleagues and with colleagues beyond Sinn Féin a real alternative as and when the next general election occurs." She declined to rule out Northern Ireland First Minister Michelle O'Neill as a potential candidate, saying the party "has options" and that "everything is still in play."

Sinn Féin's internal process for selecting a presidential candidate remains under way, Ms. McDonald said, with a "final proposition" to be presented to party members on 20 September. She added that the party could either put forward its own candidate or back another contender.

Independent candidate Catherine Connolly is already in the field, Ms. McDonald noted, and Sinn Féin leaders plan to meet with Connolly and her campaign team before discussions at the party's Ard Chomhairle, its national executive. Meanwhile, 12 potential candidates were expected to appear before Kerry County Council to seek the four local-authority nominations required to stand; that council is the first of the 31 local authorities scheduled to hear aspiring independent candidates.

The presidential poll is set for Friday, 24 October. The president of Ireland serves as head of state in a largely ceremonial role, representing Ireland at national and international events. To stand for the presidency a candidate must be an Irish citizen aged over 35 and have the backing of either 20 members of the Oireachtas or four local authorities. Only citizens resident in the Republic of Ireland are eligible to vote in the election.

Incumbent President Michael D. Higgins, inaugurated in 2011 and re-elected in 2018, is not eligible to stand again after completing two full seven-year terms. Ms. McDonald's decision removes a high-profile potential contender from a race that has attracted several independents and prompted discussion within and beyond party ranks about who might best represent Sinn Féin or be supported by it.

Ms. McDonald framed her decision as a strategic one tied to her responsibilities as party leader in opposition, saying she needs to "lead from the front" and focus on building a parliamentary alternative to the government. The party's timetable for finalising a nomination and the ongoing local-council hearings will shape the field ahead of the October vote.