This is the third publication in the series of papers on the late Miocene micromammals from the Harasib karst deposits, Otavi Mountains, northern Namibia. Its focus is the Muridae, Cricetomyidae and Dendromuridae but it contains an addendum to the Gerbillidae discussed in previous papers. In this paper five extant genera (Saccostomus, Steatomys, Dendromus, Aethomys), and three extinct ones (Otavimys, Preacomys and Afaromys) are described, containing a total of 10 species. Overall, 24 rodent species are now known from Harasib 3a. Comparisons with rodents from Ch'orora, Ethiopia, and Nakali, Kenya, indicate that fossiliferous deposits at Harasib 3a are about 9.5-10.5 Ma.