The state Supreme Court is deciding whether three lawyers should be disciplined for entering into a postsettlement agreement in a landlord-tenant case, in which one of them voluntarily agreed to not represent clients against a particular defendant.

In the consolidated cases, argued Tuesday, the Office of Attorney Ethics is seeking an admonishment for Sean Smith, an associate at Roseland’s Brach Eichler, and reprimands for his superior, partner Charles Gormally, and for Jersey City solo Cathy Cardillo, the lawyer who agreed to the restriction.