Infantino was speaking in London and stated that bid requirements have yet to be finalised.
But President Trump on Monday signed a new executive order banning immigration from six Muslim-majority countries, which could have implications for the nation's ability to host football's biggest tournament - and the 2024 Olympic and Paralympic Games which Los Angeles is bidding to stage.
"Whether that particular case was an injustice or not, we can leave it to the judgement of the referee", Infantino told reporters on Thursday. Iran, one of the six countries named, have played in three World Cups including the 2014 finals in Brazil while Syria beat China last October in a qualifier. "And then each country can make up their decision, whether they want to bid or not based on the requirements", he said.
Federation Internationale de Football Association has ruled out a bid from Europe or Asia, leaving the CONCACAF region as frontrunner for a tournament set to expand to 48 nations from 32. The impact it has on a U.S. World Cup bid could be monumental.
The US is considered favorite to host the centerpiece of world football.
UEFA boss Aleksander Ceferin told The New York Times in February: "If players can not come because of political decisions, or populist decisions, then the World Cup can not be played there". "That is obvious", he said.
The United States is now favourite to win the rights to host the 2026 World Cup, which will be expanded from 32 to 48 teams, either on its own or in partnership with Mexico and Canada.
"That is obvious. The requirements will be clear".
Until the travel ban went into place, the USA was the favorite to host the 2026 World Cup. The spirit of the competition requires that anyone from any nation be welcome in the event that they do qualify - which means the US isn't the only country whose policies might render them ineligible. "He's in charge, together with his government, to take the decisions that are best for his country". It does feel falsely self-righteous, however, given the blind eye it has turned towards human rights abuses in the run-up to the 2022 Qatar World Cup. It's general sporting criteria.