Today's UN Security Council meeting will be the most important since Ireland gained membership, according to Minister Simon Coveney.
The council meets following Russia's announcement of an escalation of the war in Ukraine.
Later Taoiseach Micheál Martin will address the UN giving an outline of Ireland's response to the war and food shortages in Africa.
Foreign Affairs Minister Simon Coveney says it will be clear at the Security Council that Russia is isolated.
"I think it's going to be a very abrasive meeting, because there is deep division in the Security Council about what is happening in Ukraine.
"Russia is quite isolate, in the context of being clear of what is happening here is because of Russian aggression against its neighbour.
"From an Irish perspective I will be making it very clear that we hold countries to account, even countries as powerful as Russia."
