“They keep supporting this theme, this topic,’’ President Volodymyr Zelensky of Ukraine said of the repeated warnings by American officials. “And they make it as acute and burning as possible. In my opinion, this is a mistake.”

Mr. Zelensky voiced his displeasure just hours before top U.S. military officials issued another dire appraisal of Ukraine’s predicament, saying that Russia has deployed sufficient troops and military hardware to invade all of Ukraine, far beyond a limited incursion into only the border regions.

“I think you’d have to go back quite a while to the Cold War days to see something of this magnitude,” Gen. Mark A. Milley, the chairman of the Joint Chiefs of Staff, told a news conference at the Pentagon…

Speaking just a day after a phone call with President Biden, Mr. Zelensky said that while he too saw grave risk in the Russian buildup, the American policy of publicizing intelligence and risk assessments around the Russian threat was unnerving Ukrainians and harming the economy at a time when he said he would like to see “quiet military preparation and quiet diplomacy.”