E. Helm Kloman III, 27, who had studied whales, played squash for Hobart and William Smith College and been a volunteer at WAMU, the radio station of American University, died Tuesday at the Collingswood Nursing Center in Rockville. He had a brain tumor.

Mr. Kloman was born in Washington and grew up in Philadelphia. He was a graduate of the Salisbury School in Salisbury, Conn. In 1972, he was a volunteer in Mayor John V. Lindsay's unsuccessful effort to secure the Democratic presidential nomination. Mr. Kloman worked for Lindsay in Florida and New England.

In 1976, he graduated from Hobart and William Smith College in Geneva, N.Y., with a degree in history and biology. He was a member of the varsity squash team.

While at Hobart, Mr. Kloman took time to study at the Institute of European Studies in Vienna, Austria. He also studied at the College of the Atlantic at Bar Harbor, Maine. It was there that he became interested in Whales. He represented Hobart at a National Whale Symposium at Indiana University.

After college, Mr. Kloman was an announcer for radio station WRUM in Rumford, Maine. He moved to Washington in 1977 and became a volunteer at WAMU.

Survivors include his mother, Lisa C. Kloman of Lakeville, Conn., and Cambridge, Mass.; his father, Erasmus H. Kloman of Washington, and two brothers, Nicholas C. of San Francisco and Alexander S. of Lakeville.

The family suggests that expressions of sympathy be in the form of contributions to the Helm Kloman Memorial Fund, College of the Atlantic, Bar Harbor, Maine, 04609.