Sinn Féin politicians, including party leader Mary Lou McDonald, will not attend St Patrick's Day events in the White House, the party has confirmed.
The party is continuing its boycott of events at the White House which began last year over US President Donald Trump's administration's support of Israel during its war in Gaza.
Sinn Féin representatives had previously carried out a series of engagements in Washington DC during the same week that the sitting Taoiseach visited the city as part of a diplomatic drive for St Patrick's Day.
In a statement, Ms McDonald said it was important Sinn Féin uses its voice to "demand that international law is upheld".
She said: "Sinn Féin will not attend St Patrick's Day events at the White House this year.
"The situation on the ground in Gaza and the West Bank remains dire, and the reality is that for all of the talk of a ceasefire, Israeli attacks on Gaza have not ended.
"The genocide continues. Civilians are still being killed. Homes are still being struck. Families who have already lost everything continue to live under fire.
"Peace in Palestine must mean the end of occupation, the end of apartheid-like systems of control and the full realisation of a sovereign Palestinian state."
Ms McDonald added: "The Good Friday Agreement has shown the world that it is possible to move out of conflict into a permanent peace. A better future for the people of Palestine and the people of Israel is possible. Peace is possible. Justice is possible.
"It is important that the eyes of the international community remain focused on what is happening in Palestine and it is important that Sinn Féin uses its voice to demand that international law is upheld and peace and justice prevail.
"The ties between the people of Ireland and the United States are of key importance. Sinn Féin has deep and enduring bonds that go back decades with those in the United States who played a key role in the peace process and in the campaign for Irish reunification.
"Sinn Féin will continue that work with senior representatives on Capitol Hill, the trade union movement, business leaders, Irish American organisations and the diaspora."
Northern Ireland's First Minister Michelle O'Neill said the decision is "absolutely the right call".
"For me this is about humanity, this is about doing the right thing, this is about using my voice and my platform to stand up for those people that are facing this genocide day after day," she told reporters at Stormont.
"So for me, the situation in Gaza remains so serious that this is not the time in which to engage in the St Patrick's Day celebration."
Ms O'Neill said she is not going to the White House because it is "the right thing to do".
"I think it's about standing on the right side of history and it's about calling out a genocide, and it's about calling out those international communities that have actually failed to take action and stop Israel acting with impunity," she said.
"So for me this is a principled standing, it's absolutely the right call for me to make politically."
