Assange, who appeared much older when he emerged from the embassy than when he sought refuge there in August 2012, has denied the Swedish rape allegation, asserting the sex was consensual. Correa had granted Assange asylum in 2012.
Two far-left German MPs, Heike Hansel and Sevim Dagdelen of Die Linke, and a Spanish Green member of the European Parliament, Ana Miranda, had been due to meet their "friend" Assange in London's Ecuadoran embassy later on Monday.
Ecuadorian president Lenín Moreno had previously chastised Assange for skateboarding indoors, urging him to change some of his behaviour inside the embassy, including spending more time cleaning up after his pet cat.
The kitty companion, who came to live with the WikiLeaks founder in 2016 amid his almost seven-year stay, was often photographed perched in the embassy window wearing a tie. He said he regretted that Assange had used the embassy to interfere in other country's democracies.
German and Spanish lawmakers protested against Julian Assange's detention on Monday, gathering outside a London prison to urge Britain and the European Union to prevent his extradition to the United States.
The Wikileaks founder faces up to twelve months in prison after being found guilty of breaching his bail conditions. Guards told the newspaper that he would give TV interviews while only wearing underwear on his bottom half, and he would leave the bathroom so messy that guards took photos and complained about it to the embassy.
Lenin Moreno also said no other nation had influenced the decision to revoke the WikiLeaks founder's asylum, which he said followed 'violations infringed by Assange'.
The letters, which are virtually identical, read: "You have expressed concern that, should Julian Assange be extradited from the United Kingdom, there would be a risk that he could be subject to the death penalty".
"We are faced with a humanitarian imperative now that Assange is in United Kingdom custody and a USA extradition request is out for him, after high ranking officials of the U.S. - including President Donald Trump - have threatened the publisher with death", said Miranda.
Assange has been charged by USA prosecutors on suspicion of conspiring with Chelsea Manning to obtain secret military and diplomatic documents, The Washington Post reported last week. "He maintained constant improper hygienic behavior throughout his stay, which affected his own health and affected the internal climate of the diplomatic mission".