Tardiness of an attorney is a violation of the Cannons of Professional Ethics. A continual disregard of the canons of ethics constitutes misconduct or moral turpitude. Misconduct or moral turpitude are grounds for disbarment. Just as clearly, tardiness of an attorney is punishable as contempt of court. Contempt of court is viewed as a criminal conviction, since the contemner is subject to fines and imprisonment. Contempt of court, if sufficiently repeated, is ground for disbarment.
Thomas L. Esper,
Tardiness of Attorneys as Contempt of Court,
19 Clev. St. L. Rev.
available at http://engagedscholarship.csuohio.edu/clevstlrev/vol19/iss3/15