Always composed under pressure, Quast's strong short game got her to the U.S. Women's Amateur quarter-finals in 1955, and to the semi-finals in 1956.

Her marriage did not last, and in 1963, after marrying for the second time, Anne Quast-Welts defeated Peggy Conley to win her third U.S.

Divorced again, Anne Quast married Steve Sander, and the couple lived in the United Kingdom from 1974 to 1979.

In 1980 she was back home in the U.S., but returned to England to compete again in the British Ladies Amateur, which she won.

In her first year of eligibility at age fifty, Quast won the 1987 U.S. Senior Women's Amateur[6] then again in 1989,[7] 1990[8] and 1993.