President Nixon is sending Henry A. Kissinger, assistant for national security affairs to Vietnam and other countries for a first hand foreign policy report, the White House announced yesterday.

Kissinger is scheduled to leave today for two or three days in Saigon. He will then visit Thailand, India and Pakistan, completing his trip with a stop in Paris to consult Ambassador David K. E. Bruce, chief U.S. delegate to the Vietnam peace talks.

Press Secretary Ronald L. Ziegler said that Kissinger would return to the United States about July 10 and report to the President and Secretary Of State William P. Rogers at San Clemente, Calif..

The President will go to California Tuesday and stay about two weeks, Ziegler said. While there he will work primarily on budget planning, but Rogers will be there part of the time for a foreign policy review, Ziegler said.

Ziegler said plans for Kissinger's trip had been under discussion "for some weeks." He insisted that no major change in policy was indicated by the visit and that no untoward developments at home or abroad prompted it .

There was widespread speculation, nevertheless, that the President wanted to explore possible new moves in the Vietnam war. Official sources, however, maintained that the trip was one more attempt to bring information up to date on Vietnamization, Hanoi's military intentions, the economy and prospects for the presidential election Oct. 3.

Kissinger is expected to confer with President Nguyen Van Thieu, but officials here discouraged speculation he may also meet with Communist officials at the Paris peace talks.

The stops in India and Pakistan will enable Kissinger to obtain the latest information on the Pakistan refugee problem and to express the President's hope for a peaceful solution to the problem.

Ziegler said that en route to California Tuesday Mr. Nixon would stop in Kansas City to brief Midwestern editors and publishers on his domestic legislative proposals.

Among officials who will confer with the President in San Clemente will be, in addition to Rogers and Kissinger, Secretary of the Treasury John B. Connally and George P. Schultz, director of the Office of Management and Budget.

Ziegler said that "the President used this period last year" in San Clemente to work on the 1972 budget, which he sent to Congress last January. He will begin work on the 1973 budget on this trip, the press secretary said.