Iran's foreign minister said Tehran does not rule out the outbreak of war, has prepared for all scenarios, upgraded weaponry, addressed capability gaps, tested new systems and placed its forces on highest combat readiness.

October 31 — Ukrainian President Zelenskiy met Turkish President Erdogan in Istanbul to discuss the Russia-Ukraine conflict and Black Sea security. At a joint briefing Erdogan said attacks on civilian vessels are unacceptable, warned that actions which escalate tensions in the Black Sea benefit no party, and said Turkey will continue diplomatic engagement to restore safe navigation. Zelenskiy said they discussed the current conflict and upcoming peace talks and agreed to cooperate on the Black Sea grain corridor.

US Secretary of State Rubio said he may invite Ukrainian President Zelenskiy to the G20 summit if Zelenskiy's attendance would bring "positive results".