Statute of Limitations for Misappropriation of Trade Secrets

If someone misappropriates my trade secrets, is there a limited time within which I must file a lawsuit?

Yes.  “A person must bring suit for misappropriation of trade secrets not later than three years after the misappropriation is discovered or by the exercise of reasonable diligence should have been discovered.”  See Tex. Civ. Prac. & Rem. Code § 16.010(a) (O’Connor’s CPRC Plus 2012-13);  see also Pressure Sys. Int'l, Inc. v. Southwest Research Inst., 350 S.W.3d 212, 216 (Tex. App. – San Antonio 2011, pet. denied).