Maryland Code, Real Property § 11B-108

(a) A person who enters into a contract as a purchaser but who has not received all of the disclosures required by § 11B-105, § 11B-106, or § 11B-107 of this title, as applicable, shall, prior to settlement, be entitled to cancel the contract and to the immediate return of deposits made on account of the contract.

(c) Any purchaser may within 3 calendar days following receipt by the purchaser of a change in mandatory fees and payments exceeding 10 percent of the amount previously stated to exist or any other substantial and material amendment to the disclosures required by § 11B-105 or § 11B-106 of this title, as applicable, which adversely affects the purchaser, cancel in writing the contract without stating a reason and without liability on the part of the purchaser, and the purchaser shall be entitled to the return of deposits made on account of the contract.

(c-1) If any deposits are held in trust by a licensed real estate broker, the return of the deposits to a purchaser under subsection (a), (b), or (c) of this section shall comply with the procedures set forth in § 17-505 of the Business Occupations and Professions Article.

(d) The rights of a purchaser under this section may not be waived in the contract and any attempted waiver is void. However, if any purchaser proceeds to settlement, the purchaser's right to cancel under this section is terminated.

(e) In satisfying the requirements of subsection (b) of this section, the vendor shall be entitled to rely upon the disclosures contained in the depository after June 30, 1989.

(f) The provisions of this section do not apply to a sale of a lot in an action to foreclose a mortgage or deed of trust.