The Israeli official who confirmed Netanyahu's participation on Sunday spoke on condition of anonymity because a formal announcement has not been made. Netanyahu is an outspoken critic of Iran, which was not invited to the conference. Iran has called the gathering an anti-Iran "circus."
Russia has also said it will not attend. The event has also received a lukewarm response from the European Union, whose foreign policy chief, Federica Mogherini, is also skipping the event. A final list of participants has not been announced.