Scientists, business travelers and grandmothers were among those trapped at U.S. airports or diverted in transit to the U.S. Saturday as the impact of an executive order reverberated around the globe.

Citing security concerns, President Donald Trump late Friday suspended the entire U.S. refugee program for four months and banned for 90 days entry into the U.S. of nationals from Iran, Iraq, Libya, Somali, Sudan, Syria and Yemen.

Late...