Former Israeli ambassador Meier Rosenne has agreed to act as a legal adviser to the Israeli government in negotiations over how his country will cooperate with the United States in the Jonathan Pollard spy case, the Israeli Embassy said last night.

An embassy spokesman said Rosenne, who left the Israeli foreign service this summer, is in New York and will come here early next week for talks with officials of the State Department and other federal agencies about the "remaining unfinished business" of the Pollard case.

Rosenne was ambassador at the time of Pollard's arrest outside the Israeli Embassy in November 1985, where he was seeking asylum. The former ambassador, who left his post last June, was involved in the subsequent efforts by the United States to ascertain the nature and degree of Israeli government involvement in what senior Israeli officials insist was a "rogue operation."

Sources said he had been asked to act for the Israeli government because of his knowledge of the case and because he is among Israel's most prominent international law experts. They said he will visit here from time to time until the still-outstanding issues of whether Israeli officials who were involved in recruiting Pollard and receiving classified documents from him will provide further information and testimony to U.S. authorities.

Pollard was a civilian counter- intelligence analyst for the U.S. Navy who pleaded guilty to selling more than 1,000 classified documents to the Israelis. He was sentenced to life imprisonment last March. His wife, Anne Henderson-Pollard, was sentenced to concurrent five-year terms as an accessory.

The United States has been especially interested in learning more about the roles of Col. Aviem Sella, an Israeli air force officer who allegedly recruited Pollard and Rafael Eitan, former head of the Israeli intelligence unit for whom Pollard worked. Revelations this year that Sella had been promoted to command Israel's second biggest air base and that Eitan had been made chairman of an Israeli government-controlled chemical concern caused severe tensions for a time between the United States and Israel.