Moreno, however, said Britain had guaranteed that the 47-year-old Australian would not be extradited to any country where his life would be in danger.
Mr Assange has long maintained the he faces charges under seal in the U.S. for revealing highly sensitive government information on his website.
Ecuadorean President Lenin Moreno said on Thursday that there was a "path" for WikiLeaks founder Julian Assange to leave the South American country's London embassy, where he has lived for six years under asylum, if he so chooses.
Assange has also been accused of using his anti-secrecy website to collaborate with Russian Federation and President Donald Trump in influencing the 2016 US presidential election, a charge that all three parties deny.
Moreno said the sentence for skipping bail would be "not long".
Deal done: Matthew Dellavedova headed back to Cleveland via trade
The deal came together Friday in time for teams to be able to repackage players in other trades before February's trade deadline. The Australian had been buried on Milwaukee's bench and is averaging just 1.7 points and 2.4 assists in 12 games.
Those fears were heightened when U.S prosecutors last month mistakenly referenced criminal charges against him in an unrelated case.
The Ecuadorian President added that he would prefer if Assange surrendered because of the cost Quito has been paying after granting asylum to him.
Assange could be questioned in the investigation by Special Counsel Robert Mueller into possible Russian interference in the 2016 election that brought President Donald Trump to office. The investigation in Sweden was later dropped, and Ecuador said there were no pending extradition requests against Assange.
Assange has been holed up in the Ecuadorian embassy since 2012 when he was granted asylum while facing allegations of sex crimes in Sweden that he said were a guise to extradite him to the US.
In November a filing error revealed that Mr Assange faced charges in the U.S. - although it was not clear what those charges were. The Justice Department prepared an indictment against the WikiLeaks founder in which prosecutors inadvertently mentioned charges against him.
Moreno noted that Assange still faced jail time in the United Kingdom for violating bail terms when he sought asylum to avoid being extradited to Sweden, where authorities wanted to question him as part of a rape investigation.