Miss. R. Civ. P. 45 governs the quashing of subpoenas in Mississippi. 

(1) In General. (A) On timely motion, the court by which a subpoena was issued shall quash or modify the subpoena if it (i) fails to allow reasonable time for compliance, (ii) requires disclosure of privileged or other protected matter and no exception or waiver applies, (iii) designates an improper place for examination, or (iv) subjects a person to undue burden or expense. (B) If a subpoena (i) requires disclosure of a trade secret or other confidential research, development, or commercial information, or (ii) requires disclosure of an unretained expert’s opinion or information not describing specific events or occurrences in dispute and resulting from the expert’s study made not at the request of any party, the court may order appearance or production only upon specified conditions. –