Lee I. Park, 83, senior partner in the Washington law firm of Hamel, Park, McCabe and Saunders, died Thursday after apparently suffering a heart attack while fishing in the Montana Rockies. He had a cabis in Yellowstone National Park.

Mr. Park had been a tax lawyer with the firm and its predecessors since 1927.

During World War II, he interrupted his private practice to serve as director of renegotiations for the Office of the Surgeon General of the Army and later as vice chairman of the War Department Price Adjustment (Renegotiation) Board. He left the Army with the rank of colonel.

Mr. Park was born in Lowry City, Mo., and grew up in Montana. He was a graduate of Montana State College and received a degree from the University of Chicago Law School in 1921.

After practicing law in Chicago, he came to Washington in 1924 to work in the Office of the Solicitor of Internal Revenue for two years before returning to private practice.

Mr. Park was chairman of the section on taxation of the American Bar Association during 1957-59 and a member of the association's House of Delegates for 1960-62.

He was a fellow of the American Law Institute. He belonged to the Metropolitan, Checy Chase and Washington Golf and Country clubs and Farmington Country Club in Charlottesville.

He is survived by his wife, Alice Mary, of the home in Washington; a sone, Dr. Lee C., of Baltimore; a daughter, Mrs. John W. Kern III, of Westgate, Md., and four grandchildren.