The 2017 Bill Beaumont County Championship Division 3 was the 13th version of the annual English rugby union County Championship, organised by the RFU for the tier 3 English counties. This was the first season it would be officially known as Bill Beaumont Division 3, having previously been known as the County Championship Shield. Each county drew its players from rugby union clubs from the fifth tier and below of the English rugby union league system. Due to changes to the competition across the board, the Division 3 competition was reduced to eight teams (see the section below for more detail on this), divided into two pools (north and south) with the pool winners meeting in the final to be held at Twickenham Stadium. New teams to the division include Middlesex, who returned to Division 3