Maryland Code, Labor and Employment § 8.3-706

(i) the denial is necessary to prevent substantial and grievous economic injury to the operations of the employer;

(ii) the employer notifies the covered individual of the intent of the employer to deny restoration of the covered individual's position of employment at the time the employer determines the economic injury would occur; and

(iii) if the leave has already begun in a case of leave from work for which benefits may be paid under this title, the covered individual elects not to return to employment after receiving notice of the employer's intention to deny restoration of the covered individual's position of employment.