Sir Walter Balfour Barttelot, 3rd Baronet DSO (22 March 1880 – 23 October 1918) was of the Barttelot Baronetcy and grandson of Sir Walter Barttelot, 1st Baronet. The Barttelots are said to have come into England with William the Conqueror, and to have fixed their residence at a place called "At Ford", in the parish of Stopham Sussex.