Sweden, Italy, Canada, Austria, Portugal, and Indonesia. New Zealand and Australia may change, as might Germany. I should also point out that calling Putin left wing or right wing is insane.
The ex-KGB agent is obviously center-left. He's allied with Assad, Kim, Xi, all the major left-wing powers, as well as the main anti-American powers like Iran, and the non-aligned powers like India. His main opponents are the right-wing Navalny at home and right-wing Ukrainian nationalists. The only exception is his support for the European and American far-right, but that's just an alliance of convenience to weaken the West. There's a reason why jfern loves him so much.
Putin is broadly nonideological. The only sure thing is that he is a nationalist/militarist intent on extending his nation's influence and power. Personally, I would prefer the Russo-Indian duo to their counterparts in the increasing Sino-Pakistani friendship. I think that's where WWIII is most likely to break out. Iran's two closest allies are Pakistan and Russia. It has cold relations with India and China. I can't see them taking sides. For that reason, I can't really see the war expanding to include Iran, Syria, Turkey, Belarus, the Caucasus, the Balkans, or the two's increasing sphere in Africa and, to a lesser extent, South America.