US President Donald Trump is due to attend the G7 summit in Quebec this week before travelling to Singapore for a summit with North Korea's Kim Jong Un on 12 June - but his first lady will not be by his side.
The first lady hasn't been seen publicly since May 10.
Since her last sighting, Melania Trump had skipped well-known first lady White House photo ops like the Medal of Honor ceremony and the Memorial Day wreath laying at Arlington National Cemetery. She participated in public appearances with the spouses of other G7 leaders, including a formal dinner and taking in a performance by La Scala Philharmonic Orchestra at the Ancient Theatre of Taormina.
On May, 30 first lady tweeted that she was "feeling great" to address speculation about her health, after not being seen in public for 20 days.
Her absence is leading to a plethora of different theories, including speculation that she has moved back to Trump Tower in NY.
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She's also not planning to accompany him to the expected meeting with North Korea's leader in Singapore the week after, according to spokeswoman Stephanie Grisham.
However, many social media users were skeptical Melania Trump herself wrote that tweet. Asked how his wife was doing, a week after her return to the White House, he pointed towards what appeared to be an empty window, saying: "She's doing great". "The First Lady looks forward to a full recovery so she can continue her work on behalf of children everywhere". However, Trump is apparently doing well, if her latest tweets are to be believed.
That prompted a response from Melania's official first lady Twitter account this week.
Donald Trump just spent the weekend at Camp David - without her.
There have been no indications on when she may been seen in public again and the two events she is working on are likely weeks away.