Massachusetts General Laws Part III. Courts, Judicial Officers and Proceedings in Civil Cases (Ch. 211-262) Ch. 260, § 9

If, when a cause of action hereinbefore mentioned accrues against a person, he resides out of the commonwealth, the action may be commenced within the time herein limited after he comes into the commonwealth; and if, after a cause of action has accrued, the person against whom it has accrued resides out of the commonwealth, the time of such residence shall be excluded in determining the time limited for the commencement of the action; but no action shall be brought by any person upon a cause of action which was barred by the laws of any state or country while he resided therein.