While answering questions on the South Lawn of the White House Friday, Trump said the first lady was doing "great" after she was hospitalized for six days last month and underwent a medical procedure for a benign kidney condition at Walter Reed Medical Center in Bethesda, Md.
"She had a big operation," Trump said Friday. "That was close to a four-hour operation."
The president said Melania Trump "wanted to go" to the G7 summit, but said doctors said his wife "can't fly for one month."
The first lady has kept a low public profile since her surgery and made her first public appearance during a FEMA briefing Wednesday.
Late last month, Melania Trump tweeted she was "feeling great" in an effort to scuttle rumors of her whereabouts.
"I see the media is working overtime speculating where I am and what I'm doing," the first lady tweeted. "Rest assured, I'm here at the White House with my family, feeling great, & working hard on behalf of children & the American people!"