"Time for others to ascend and do the work they are capable of," the US President tweeted late Saturday night.
He warned that ISIS should "drop more than 800 prisoners" could make their way to Europe.
"The alternative is not good as we will be forced to release her," Trump tweeted.
"The US does not want to see these IS fighters pervading Europe from where they are expected."
At its peak, the group controlled an area the size of Britain and ruled over 1
Britain will not hesitate to prevent the return of fighters
On Friday, British Home Secretary Sajid Javid said Britain would "not hesitate" to prevent the return of ISIS fighters to Britain but those who manage to return will be investigated and possibly prosecuted.
Downing Street referred CNN to Javid's Friday statement when asked about Trump's tweets.
"We have a series of stringent measures to prevent people from being pose a serious threat to return to the UK, including the expropriation of their British citizenship or exclusion from the UK, "said Javid.  "We are watching attentively the returnees who pose a risk, and the new terror laws passed this week make it possible for us to make traveling to certain regions a crime, and we also support communities in their efforts "To prevent radicalization."
The Home Secretary added that his priority was "to ensure the safety and security of Britain," and he said he would "not jeopardize this." [19659016TrumpsTweetscomeThearafterTheBritishTeenager2015ISISIShadwanttobecometobecomecomepregnant
Laura Perez Maestro of CNN contributed to this History at.