Each season a team from Counties 3 Yorkshire or Counties 4 Yorkshire may be picked to take part in the RFU Junior Vase - a national competition for clubs at levels 9–12.

This was the first season following the RFU Adult Competition Review.

On 30 October 2020 the RFU announced [1] that due to the coronavirus pandemic a decision had been taken to cancel Adult Competitive Leagues (National League 1 and below) for the 2020/21 season meaning Yorkshire 3 was not contested.

The creation of National 5 North for the 1993–94 season meant that Yorkshire 3 dropped to become a tier 12 league.

A further restructure at the end of the 1995–96 season, which included the cancellation of National 5 North and the addition of North East 3 at tier 9, saw Yorkshire 3 remain at tier 12.