Thailand joined 140 other nations in voting for a United Nations resolution demanding an immediate withdrawal of Russian forces from Ukraine.
The kingdom voted to support the resolution that condemned Russian "aggression against Ukraine" during an emergency meeting of the UN General Assembly at the UN's New York headquarters on Wednesday.
In total, 141 out of 193 member states voted for the resolution, 35 abstained and five voted against it.
General Assembly resolutions are not legally binding.
Seven other members of the Association of Southeast Asian Nations (Asean) voted for the resolution, while Vietnam and Laos were among the abstentions.
Although Thailand supported the General Assembly move, it did not mention Russia by name in a statement on the issue released Wednesday.
"Thailand is gravely concerned with the worsening hostilities and violence as a result of the use of military forces in Ukraine, which has led to the loss of life, including of innocent civilians and destruction of property and civilian infrastructure," Suriya Chindawongse, ambassador and permanent representative of Thailand to the UN, said in the statement.
Asean foreign ministers issued a statement on the situation in Ukraine on Feb 26. Since then, armed hostilities have continued and causalities, including those of civilians, have risen.
Mr Suriya said Thailand commends Ukraine's neighbouring countries and other states for their prompt action in mobilising assistance to assist those in need, especially refugees.
"On our part, Thailand shall do our utmost in addressing the urgent humanitarian needs of affected citizens, directly and in partnership with like-minded international organisations," he said.