As it prepares to combine with Norton Rose Fulbright, Chadbourne & Parke is suddenly grappling with a third accuser in a $100 million gender discrimination case that has been hanging over the firm since last year.

Mary Yelenick, a former chair of Chadbourne’s products liability group and a longtime New York partner now working as of counsel at the firm, filed papers late Monday seeking to join the proposed class action as a plaintiff. According to Yelenick’s profile on professional networking website LinkedIn, she spent more than 35 years at Chadbourne after joining the firm in 1981.