Diane Donnelly Stone is an American former professional tennis player.

Donnelly, along with Katrina Adams, won the 1987 NCAA doubles championship, while competing for Northwestern University.

[1] The pair featured together in the women's doubles main draw at the 1987 US Open.

She also played in some professional satellite tournaments and reached a career high world ranking of 209 in doubles, winning two ITF titles.

Both Donnelly and her sister Tracey, who played collegiate tennis, have lived with Type I diabetes since childhood and have an annual scholarship named after them to help student-athletes with diabetes.