Justices Clarence Thomas, Samuel Alito and Neil Gorsuch said they would have let the entire ban take effect immediately. In the meantime, exceptions will be made for people with "bona fide" connections to the U.S.
The initial order created chaos and confusion as the Trump administration scrambled to make changes amid backlash as legal US residents, refugees and holders of valid visas were denied boarding at foreign airports or detained and sent back overseas after landing in the United States.
The justices are expected to hear the travel order case later this year, but noted that they will also consider whether the case will be moot at that point. The Dulles Justice Coalition, which established a pool of volunteer attorneys at Dulles International Airport after the first travel ban, is planning to return to the Virginia airport outside Washington, said DJC board member Sirine Shebaya.
Immigrant rights advocates welcomed the ruling for showing that the president's authority on immigration is not absolute and ensuring people with connections in the US will be allowed to enter.
"It's regrettable that the citizens of the countries on the list have never participated in any act of terrorism against the US and yet they are being punished for acts of terrorism by citizens of other countries which are not on the list", Zarif said in Berlin on June 27.
The court's majority laid out the "bona fide" relationships it had in mind.
The court offered only broad guidelines about what would constitute such a relationship suggesting it would include a close relative, a job offer or an invitation to lecture.
Still, Thomas, Alito and Gorsuch found that guidance confusing and unworkable.
The court also gave examples of who may qualify for exemptions, including those with close family ties in the United States, obtaining a place at a US university, or offers of employment. Among other questions lawyers were grappling with were the intent of the executive order and how specific the instructions should be in interpreting what constitutes a "bona fide relationship".
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Sanders said he believes that it is a sad state of politics when family members of those in elected office become targets. As for himself, Sanders has foresworn any talk now of a 2020 presidential rerun, when he will become 79.
A federal judge in Seattle blocked the order a week later, and Trump eventually revised it, dropping Iraq from the list and including reasons people might be exempted, such as a need for medical treatment.
My suggestion is that the State Department should use the term "attending a university" strictly and allow the admission of only foreign students admitted to the United States by the date of the decision, June 24, and who had, additionally, started attending classes by that date.
The man, who declined to be identified, said he wouldn't know the outcome until at least Sunday, when the U.S. Embassy opens again after a string of national holidays.
But Zarif said the development would force terrorists to do more harm.
Q: Tell us more about the order.
The highest court in the land also modified the blocks placed on the ban by lower courts, allowing a limited version to go into effect while the court waits to hear arguments. But by then, a key provision may have expired, possibly making the review unnecessary.
The US president initially signed an executive order of the travel ban in January.
"The underlying issue of presidential power is too important and too likely to occur in the future", he said.