[Singapore] has condemned Russia’s attacks and said that its invasion of Ukraine is a violation of international law ... "Singapore has taken the position we did on Ukraine ... because of our consistent commitment to the principles of sovereignty and territorial integrity of all countries,” [PM Wong] said.

It's an important detail, and we should note that Putin complained about the sanctions Singapore has imposed on Russia because of the Ukraine war. It was also Putin who requested this 'summit' as he reportedly runs out of options in his desperate effort to rescue Russia's economy (or, better, what remains left).