Aleksandar Vučić landed in Kyiv for the fifth Southeast Europe-Ukraine Summit with the practiced posture of a man who wants credit for being in the room. He got his photo with Ursula von der Leyen. He delivered warm words about Serbia's European path and bilateral cooperation. Then, when the summit's joint declaration came around — the one calling for intensified pressure on Russia and strengthened air-defense support for Ukraine — Vučić was the only leader at the table who did not sign it.

That is not a detail. That is the story.

The summit, rotating this year to Kyiv after previous editions in Odesa, Athens, Dubrovnik, and Tirana, was designed precisely to build a visible coalition of European states — large and small, EU member and candidate alike — standing with Ukraine. Every other participating government signed on. Serbia pledged humanitarian aid and spoke of European solidarity. Then it drew a hard line at anything that could be read as an endorsement of direct economic or political pressure on Moscow.

Vučić's public explanation centered on Serbia's formal policy of military neutrality and its refusal to join sanctions against Russia — positions he has maintained since February 2022 despite sustained pressure from Brussels and Washington. In his telling, Serbia is a friend to Ukraine in need, but not a party to what he frames as a geopolitical bloc. Critics — and there are many, including inside the EU accession process — read it differently: Belgrade continues to trade with Russia, continues to receive Russian energy through Hungarian pipelines, and continues to resist any move that would cost it something real in Moscow.

The timing adds a layer. Serbia is formally an EU candidate, meaning Kyiv summits like this one are partly about demonstrating the alignment that membership requires. Von der Leyen's presence underscored that the European Commission is watching how candidates behave, not just what they say in accession chapter negotiations. Vučić met with her on the sidelines — the substance of that conversation has not been disclosed — but the symbolism of Serbia's unsigned declaration will follow him back to Brussels briefing rooms regardless.

The domestic political dimension is equally tangled. Vučić moved quickly after the summit to distance himself from a statement by a Serbian official — identified as Paunović — whose remarks he said did not reflect the position of the presidency or the government. The clarification suggested internal messaging discipline had slipped, and that someone in Belgrade's apparatus had wandered off-script in a moment when every word from the Serbian delegation was under a magnifying glass.

What Serbia actually pledged — humanitarian aid, stated support for Ukraine's sovereignty, continued engagement in the summit format — is not nothing. Vučić is not Viktor Orbán, and Belgrade is not running diplomatic cover for Moscow in the way Budapest has done inside EU council rooms. But the gap between the rhetoric of European solidarity and the refusal to attach Serbia's name to any document with real political cost is a gap Vučić has exploited for three years. It keeps him viable in both directions: palatable enough for Brussels, unthreatening enough for Moscow.

The summit's other participants agreed on a communiqué covering reconstruction financing, air-defense coordination, and the push for sustained international pressure on Russia to end the war. Those are not abstract commitments — air-defense cooperation in particular has direct operational implications for Ukraine's ability to protect its cities. Serbia's absence from that consensus is noted in every capital that signed.

For Kyiv, the optics of hosting Vučić are complicated but probably worth it. A Serbian president physically present in the Ukrainian capital, in wartime, is a signal in itself — particularly to audiences in Belgrade who have been fed a steady diet of pro-Russian sentiment by parts of the domestic media landscape. Ukraine wants Serbia inside the tent, even a Serbia that won't sign the guest book. Whether that patience pays off, or whether Vučić has simply found another forum to attend without cost, is the question nobody at the summit podium was willing to ask out loud.