As the realization sank in that people with dual-citizenship who live outside the targeted Mideast and African countries would be affected, condemnation mixed with concern about families with traveling members who could be prevented from returning to the United States they call home.
Olympic long-distance running champion Mo Farah — born in Somalia, citizen and knight of Britain, U.S. resident and currently training in Ethiopia — wondered how he would tell his children that "daddy might not be able to come home."
The ban, Farah said in a statement on his Facebook page, "comes from a place of ignorance and prejudice" and "seems to have made me an alien."
In Iran, director Asghar Farhadi said the ban had prompted him to skip this year's Academy Awards, where his film "The Salesman" is nominated for best foreign language film.
He condemned the "unjust conditions forced upon some of my compatriots and the citizens of the other six countries," and expressed "hope that the current situation will not give rise to further divide between nations."
Etihad Airways, the United Arab Emirates' national airline, said some of its passengers were affected by the new policies and like other major airlines, was working closely with American officials on the matter.
Leaders of Britain and Germany joined other American allies in criticizing Trump's entry ban, even as some far-right politicians expressed hope the move would inspire similar measures in Europe.
British Prime Minister Theresa May does "not agree" with Trump's order and will challenge the U.S. government if it has an adverse effect on British nationals, a spokesman said. The official comment came after May said during a meeting Saturday with Turkish leaders the decision was a matter solely for the U.S.
Her main political rival, Labour Party leader Jeremy Corbyn, called for Trump to be banned from visiting Britain until the temporary travel restrictions are rescinded.
A petition on the British Parliament's website attracted hundreds of thousands of signatures backing its call for Trump, who has been invited to meet Queen Elizabeth II, to be barred on the basis of misogyny and vulgarity.
German Chancellor Angela Merkel, who has drawn fire for her government's welcoming refugee policies, also regretted the ban.
Merkel raised the issue during a phone call with Trump Saturday, citing the 1951 Geneva Refugee Convention that calls on signatories to take in people fleeing war, spokesman Steffen Seibert said.
"She is convinced that even the necessary, resolute fight against terrorism doesn't justify putting people of a particular origin or particular faith under general suspicion," Seibert said.
He said Germany's government "will now examine what consequences the U.S. government's measures have for German citizens with dual citizenship and, if necessary, represent their interests toward our American partners."
The order Trump issued Friday includes a 90-day ban on travel to the U.S. by citizens of Iraq, Syria, Iran, Sudan, Libya, Somalia and Yemen, and a 120-day suspension of the U.S. refugee program.