On Thursday, Russian Foreign Minister Sergei Lavrov is set to face his Ukrainian counterpart and Western foreign ministers, including US Secretary of State Anthony Blinken, when the UN Security Council meets over the atrocities in Ukraine.
In July, Lavrov pulled out of a meeting of G-20 foreign ministers in Indonesia, when he faced calls for an end to the war and criticism over the conflict worsening the global food crisis.
Lavrov denounced the West for its "rabid criticism".
While it is unlikely that Russia's seat on the United Nations Security Council will be left empty at the meeting, it was not clear how long Lavrov would remain in the room.
UN Secretary-General António Guterres and ICC Prosecutor Karim Khan will brief the 15-member body that meets during the annual gathering of world leaders at the UN General Assembly.
After Guterres and Khan briefed, the 15 council members will speak, followed by Ukraine, several European countries, Belarus, and EU foreign policy chief Josep Borrell.
"(Russia) has committed a crime against Ukraine, and we demand a just punishment," Ukrainian President Volodymyr Zelensky told the General Assembly on Wednesday in a recorded video.
"A crime committed against the lives of our people, a crime against the dignity of our women and men," he added.
Ukraine, the United States and other countries have accused Russia of committing war crimes in Ukraine.
Russia denies targeting civilians during what it calls its "special military operation", describing accusations of human rights violations as a smear campaign.
The Security Council meets a day after Russian President Vladimir Putin ordered hundreds of thousands of Russians to fight in Ukraine, move to annex swathes of Ukrainian territory and threaten to use nuclear weapons.
The council was unable to take any meaningful action on Ukraine because Russia is a permanent member with veto power along with the United States, France, Britain and China.
Thursday's session will be at least the 20th that the Security Council meets on Ukraine this year.
Ukraine's chief war crimes prosecutor told Reuters last month that his office had been investigating about 26,000 cases of suspected war crimes since Russia's war on Ukraine began on Feb. 24 and had charged 135 people.
Ukrainian officials said last week that they had found hundreds of bodies, some with hands tied behind their backs, buried in an area near the northeastern town of Izyum that Ukraine had retaken from Russian forces, while Zelensky described this as evidence of war crimes by the invaders.
The head of the pro-Russian administration, which abandoned the area a week ago, accused the Ukrainians of committing atrocities at Izyum.
This week, the Office of the United Nations High Commissioner for Human Rights recorded 5,916 civilians killed and 8,616 injured in Ukraine since the start of the conflict.