NEW DELHI — As the death toll from sectarian violence that has convulsed India’s capital passed 20 on Wednesday, Prime Minister Narendra Modi called for a quick restoration of “calm and normalcy.”

“Peace and harmony are central to our ethos,’’ Mr. Modi said via Twitter, a day after hosting President Trump. “I appeal to my sisters and brothers of Delhi to maintain peace and brotherhood at all times.”

Streets that had been a battle zone were much quieter on Wednesday, with a few sporadic attacks reported but no large-scale mayhem.