The generalized Hyers-Ulam-Rassias stability of generalized module left ▫(m,n)▫-derivations on a normed algebra ▫mathcalA▫ into a Banach left ▫mathcalA▫-module is established.V članku je obravnavana Hyers-Ulam-Rassias stabilnost posplošenih modulskih levih ▫(m,n)▫-odvajanj, ki slikajo iz normirane algebre ▫mathcalA▫ v Banachov levi ▫mathcalA▫-modul