A new legal ethics opinion highlights the need for attorneys to keep in mind professional conduct rules when complying with international privacy laws.

The Maryland State Bar Association’s newest ethics opinion addresses how to avoid conflicts of interests when a former client invokes the “right to be forgotten” under the EU’s General Data Protection Regulation.

The bar’s Oct. 2 opinion is the first ever U.S. ethics opinion to discuss how attorneys can comply with both a state’s rules of professional conduct and the GDPR, which went into effect in May.

If a client invokes the GDPR’s right to erasure, also...