The Israeli Supreme Court has offered its backing for the deportation of a Human Rights Watch activists.
Omar Shakir's visa will not be renewed by the Israeli immigration authorities and he will have to leave the country within 20 days or be deported.
The decision against Omar Shakir, who is a citizen of the United States of America, was published in the apex court's website.
Shakir rebuffed the Israeli government's contention that he had called for other countries to boycott Israel.
The Human Rights Watch activist is said to be a supporter of the so-called Boycott, Divestment and Sanctions (BDS) movement that has actively called for countries to cut all links with Israel.
Israel has designated the group a criminal organisation.
Human Rights Watch reacted to the Supreme Court's decision, saying that it showed that Israel was keen on suppressing criticism of its human rights record that the organisation said was wanting.
In a tweet after the decision, Mr Shakir said that by enforcing the Supreme Court's verdict, Israel would be effectively joining the ranks of countries that had banned Human Rights Watch staff.
''Breaking: Israeli Supreme Court upholds my deportation over my rights advocacy. Decision now shifts back to Israeli gov; if it proceeds, I have 20 days to leave & it’ll join ranks of Iran, N Korea & Egypt in blocking access for @hrw official. We wont stop. And we wont be the last,'' Shakir tweeted.