Donald Trump has cancelled a visit to the UK planned for February, saying he was not a "big fan" of the new US embassy in London he was due to open.
The US president had been expected to open the new $1bn (£738m) building, commissioned by his predecessor Barack Obama, which he said was a "bad deal".
The ceremony may instead be hosted by US Secretary of State Rex Tillerson.
Mr Trump accepted the Queen's invitation for an official state visit when Theresa May met him last year.
Downing Street declined to comment on Mr Trump's cancellation of February's working trip to the UK.
In a tweet, Mr Trump said he was not happy that the Obama administration had sold the previous US embassy at Grosvenor Square in London for "peanuts".
He said the new building in Vauxhall, south London, was in an "off location", adding: "Wanted me to cut ribbon-NO!"
The latest development follows reports that Mr Trump wanted to delay a potential visit amid concerns about large-scale protests.
Mrs May was the first foreign leader to meet Mr Trump after his inauguration when she visited the Oval Office in January 2017, reports BBC.