It is not immediately clear if other delegations had been excluded but players from Qatar have suggested they may have been rejected.
Israeli players have been denied visas to participate in a speed chess championship hosted by Saudi Arabia this week, a vice-president of the World Chess Federation (FIDE) said on Sunday.
Seven Israeli players had requested visas for the tournament on December 26-30. It would have marked the first time Saudi Arabia had publicly hosted Israelis as the Gulf state does not recognize Israel and there are no formal ties between them.
Israel Gelfer, vice president of FIDE, whose Secretariat is based in Athens, told Reuters in an email that visas for the Israeli players "have not been issued and will not be issued".
He said the tournament would go ahead as planned. It is not immediately clear if other delegations had been excluded but players from Qatar have suggested they may have been rejected.
Saudi Arabia's Center for International Communication said in a statement that more than 180 players would participate but did not immediately respond to a request for comment.
Israel Chess Federation Spokesman Lior Aizenberg said efforts are still being made "by various parties" to ensure the Israeli players took part.
"The event is not a world championship if they prevent chess players from several countries from taking part," Aizenberg told Reuters.
"Every chess player should have the right to participate in an event on the basis of professional criteria, regardless of their passports, their place of issue or the stamps they bear."
Aizenberg said FIDE should ensure Israeli players could compete in international events and that the Israeli federation is considering all options, including legal action and holding an international competition in Israel for players excluded from the Saudi match.
FIDE had said in November it is undertaking a "huge effort" to ensure all players are granted visas.
Photograph: Kind courtesy Lennart Ootes/Grand Chess Tour