President Carter will meet with Jordan's King Hussein in Iran next weekend to urge Jordan to join in the peace talks launched by Egypt and Israel, it was disclosed yesterday.

The President initiated the idea for the meeting with King Hussein, which will fit into Carter's scheduled visit to Iran during his six-nation trip abroad, it was announced in plains, Ga. Tehran, the capital of Iran, is the second stop on Carter's schedule after Warsaw. He arrives Saturday and is scheduled to depart from Iran the following day, New Year's Day.

When asked if the President intends to encourage the Jordanian ruler to join the Middle East peace talks, White House assistant press officer Claudia Townsend replied, "I think that is a reasonable thing to assume."

The meeting with King Hussein adds a new element of immediacy to the President's trip to Europe, the Middle East and South Asia, originally planned for long-range foreign policy purposes.

Administration officials said there are no current plans to add meetings with other participants in the Arab-Israeli conflict during the trip, but the United States has been the leading advocate to broadening the Egyptian-Israeli negotiations into a comprehensive Arab-Israeli peace settlement.

Israeli Prime Minister Menahem Begin already has proposed that he, President Carter and Egyptian President Anwar Sadat meet soon to climax the initial stage of peace negotiations.

A senior State Department official said Thursday night that King Hussein is prepared to join the Arab-Is-raeli peace talks in the near future. The united States has wanted Jordan to participate in the Cairo discussions where the principals are Egypt and Israel, with the United States present in a mediating role.

As of Thursday, u.S. officials said it was unlikely that Jordan would join the talks until a later stage when it is hoped that they will be broadened and shifted to Geneva.

Reports from Jerusalem now indicate that Israel is prepared to be more flexible on the issue that most concerns Jordan - the status of the Israeli-occupied West Bank of Jordan

Israel is unofficially reported to be ready to propose autonomy for Palestinian Arabs with the creation of three cantons, in Judea and Samaria on the West Bank and in the Gaza Strip, and to permit self-determination for those regions within five years. There is expected to be a link between the Cantons and Jordan.

A key issue for Jordan has been Israel's insistence that its military security must be protected in the West Bank Gaza regions. At issue is the form and duration of that security presence and the degree of self-determination that will be given the Palestinian Arabs.

Jordan presently is closely aligned with Syria whose president, Hafez Assad, has refused to have any part in Sadat's overtures to Israel.American officials have said, however, that King Hussein's national interests are expected to bring him into the peace talks before Syria, with American officials hoping that Syria will join later in Geneva.

In Plains, press officer Townsend said that the Carter-Hussein meeting in Tehran was arranged in "coordination with the shah" of Iran. The Carter meeting with Hussein will fit into the President's travel schedule without requiring any change in the itinerary, she said.

Although there are no plans for Carter to meet with any other direct participants in the Arab-Israeli conflict, the press officer said, the President does have on his schedule a visit to Saudi Arabia, which is highly influential behind the scenes of the Sadat-Begin negotiations. What role Jordan and Syria take in the peace negotiations can be influenced considerably by the attitude of Saudi Arabia.

The shah of Iran is on very good terms with Israel, and Iran is an oil supplier for Israel.

Carter leaves for Warsaw Thursday and remains in Poland until his [Text incomplete] depar