García Sánchez III, sometimes García III, IV, V, or VI (also García of Nájera, from , November 1016 – 1 September 1054), was king of Navarre from 1035 to 1054. He was the eldest legitimate son and heir of Sancho III the Great, born November 1016, and he succeeded his father to the crown of Navarre, becoming feudal overlord over two of his brothers: Ramiro, who was given lands that would serve as the basis for the kingdom of Aragón; and Gonzalo, who received the counties of Sobrarbe and Ribagorza. Likewise, he had some claim to suzerainty over his brother Ferdinand, who under their father had served as Count of Castile, nominally subject to the Kingdom of León but brought under the personal control of Sancho III.