A Queens man has filed a $100,000 illegal-discrimination lawsuit a year to the day he says a supervisor at a Fifth Avenue Starbucks coffee shop refused to refill his coffee and then ordered him out of a bathroom stall in which he had sought refuge, telling him not to return to the store.

Prasanna Goonewardena of Bellrose, Queens, writes in court papers filed in Manhattan civil court that the Starbucks assistant store manager, Evans Jean-Pierre, verbally abused him last November when he sought a $0.54 refill on a large coffee drink, prompting Mr. Goonewardena to use the restroom — which he says Mr. Jean-Pierre forced him out of before he could finish relieving himself. The papers, filed by the plaintiff without a lawyer, accuse Mr. Jean-Pierre and Starbucks of denying him the refill and bathroom privileges because of Mr. Goonewardena’s “physical appearance and foreign accent which would not have been withheld from native born Americans.”

A woman who answered the telephone at Mr. Goonewardena’s residence in Bellrose, and identified herself as one of his relatives, said he was born in Sri Lanka, but she referred other inquiries to Mr. Goonewardena himself, who didn’t immediately return a message left by The New York Sun.

A corporate spokesman for Starbucks Corporation in Seattle, Alan Hilowitz, said the company could not comment because it has not seen a copy of the lawsuit.