A concert at a festival in Italy that was to have been the conductor Valery Gergiev’s first in Western Europe since Russia invaded Ukraine more than three years ago was canceled on Monday amid a backlash over the musician’s close ties to President Vladimir V. Putin of Russia.

Antonella Giannattasio, a spokeswoman for the Un’Estate da RE festival, said in a telephone interview that Mr. Gergiev would no longer perform on July 27 at the Royal Palace of Caserta, a historic site north of Naples.

Italian activists and politicians had denounced plans for Mr. Gergiev to conduct at the event. Mr. Gergiev, a staunch ally of Mr. Putin, lost all his engagements in the West when Russia invaded Ukraine in early 2022.

There was concern in Italy and more broadly in the European Union about Mr. Gergiev’s participation, given that the festival is bankrolled by the bloc. There were fears that his presence could be seen as an endorsement of Russia at a time when Europe is scrambling to provide weapons to Ukraine as the Trump administration’s support for Kyiv has seemed to waver.

Italy’s culture minister, Alessandro Giuli, said in a statement on July 15 that allowing Mr. Gergiev to participate in the festival “risks passing the wrong message.”

“Ukraine is an invaded nation, and Gergiev’s concert may turn a high-level but objectively controversial and divisive musical event into a sounding board for Russian propaganda,” Giuli added. “Which for me would be deplorable.”

The planned concert also drew international condemnation. Yulia Navalnaja, the widow of the Russian opposition leader Aleksei Navalny, wrote in a guest article for the Italian daily la Repubblica last week that Mr. Gergiev’s performance in Italy “would be a gift to the dictator.”

Before the war in Ukraine, Mr. Gergiev was one of the world’s most sought-after conductors, with regular engagements at leading concert halls and opera houses. But his work in the West dried up after he declined to denounce Mr. Putin’s invasion of Ukraine. He lost numerous engagements, and the Munich Philharmonic removed him from his post as chief conductor three years before his contract had been set to expire.

Mr. Putin rewarded Mr. Gergiev in 2023 by tapping him to lead the Bolshoi Theater in Moscow. The move put him at the pinnacle of Russian culture, since he was already the artistic and general director of the nation’s other leading performing arts institution, the Mariinsky Theater in St. Petersburg. (In Moscow Mr. Gergiev replaced Vladimir Urin, who had been the Bolshoi’s general director since 2013 and who had signed a petition expressing opposition to the war in Ukraine.)

Mr. Gergiev and Mr. Putin have known each other since the 1990s, and the maestro has supported the Russian leader in election campaigns.

Elisabetta Povoledo and Alex Marshall contributed reporting.