The much-anticipated Istanbul peace talks between Russia and Ukraine, scheduled for May 15, underwent multiple delays throughout the day. By morning, Russia's delegation led by Putin's aide Vladimir Medinsky arrived in Istanbul, following Putin's special briefing the previous evening. Scheduled initially for 10:00 MSK, the talks were postponed to afternoon, and eventually rescheduled for May 16.

Medinsky stated Russia was ready for "possible compromises" while emphasizing the goal of establishing "lasting peace." Throughout the day, Russian media reported Zelensky refused to personally participate, with Ukrainian delegation reportedly willing to discuss only one specific topic.

By evening, after meeting with Turkish Foreign Minister Fidan, Medinsky announced the Russian delegation would wait for Ukrainian representatives at 10:00 the next morning. Moscow Times reported that state media received instructions to prepare Russians for potential negotiation failure and new sanctions.