UNITED NATIONS, AUG. 25 -- Iran's deputy foreign minister, Mohammed Jawad Larijani, completed two days of negotiations here with the secretary general and Security Council members on a Persian Gulf cease-fire, and a U.N. spokesman said tonight that both sides agreed to resume the dialogue shortly.

Diplomats said the Iranian promised a response by next week on whether Tehran would start negotiating the terms of a comprehensive settlement in its seven-year war with Iraq. But they also said he had made no commitment to accept a cease-fire under any conditions.

A Security Council resolution demanding the cease-fire was adopted unanimously July 20, and has been accepted in its entirety by Iraq.

By meeting with 13 members of the council (all but the United States and France), and with Secretary General Javier Perez de Cuellar, "Larijani has a clear concept of what the package should consist of and how it should be set in motion," said a participant. "The next step is for Iran to agree to negotiate the terms of settlement, including the sequence, at which time it could bring up issues not included in the resolution."

The resolution called for the creation of a commission to determine blame for the war, but Iran has demanded condemnation of Iraq as a first step. The secretary general has been conciliatory with Iran, said one source, because he has sensed a reluctance among council members to press ahead with a second resolution, proposed by Washington, which would impose an arms embargo on Iran for failing to accept the cease-fire.

"Everyone recognizes that Iran may be stalling," he said, but "there are so many opinions among council members that he cannot afford to give Tehran an ultimatum."

One sign of the desire to give Iran more time came from Tunis today, where the Arab League foreign ministers extended until Sept. 20 their own deadline for Iran to accept the U.N. cease-fire.

{Tn Paris, the Foreign Ministry announced the return of the wife and child of a French diplomat who has been confined at his embassy in Tehran for five weeks, United Press International reported.}