TEHRAN, June 30 -- Iran said on Monday that it has no plans to negotiate with the United States in Qatar in the days ahead, a flat denial from its foreign ministry that ran directly against President Trump's assertion that the two sides would sit down together in Doha on Tuesday.

Esmail Baghaei, the foreign ministry spokesman, said Tehran was not preparing for contact with Washington "at any level in the coming days," and he drew a sharp line between two separate Iranian missions that have become tangled in the public conversation. An Iranian expert delegation is indeed traveling to the Qatari capital this week, Baghaei said, but its task is to work through the mechanics of unfreezing Iranian money held in Qatar, not to meet American off...