Kuwaiti state media on Sunday reported Emir Sheikh Sabah al-Ahmad Al-Sabah had "recovered", shortly after Iran's foreign minister indicated that the 90-year-old was unwell.
The emir "has recovered from a setback and is in good health now", Kuwait's official news agency KUNA said, citing a palace statement, without specifying the nature of the "setback".
Iranian Foreign Minister Mohammad Javad Zarif had earlier on Sunday wished Sheikh Sabah a "speedy recovery" after talking with the Gulf state's officials.