The rescheduled event will still take place at Ragley Hall in Warwickshire and BASC members will continue to receive complimentary access to all three days.
BASC chief executive Ian Bell said: “BASC fully supports the difficult decision that has been taken by The Game Fair’s management team under challenging circumstances.
“We are confident the event in September will provide a much-needed life-line for rural businesses and something to look forward to for the many thousands of visitors that will be expected to attend.
“As a key partner, BASC will be at Ragley in full force and we look forward to catching up with our members, who will still receive complimentary admission on each day of the event.”
The Game Fair’s managing director, James Gower, said: “We continue to be positive and focused on planning an amazing celebration of the countryside.
“After many months of social distancing, it is our hope that The Game Fair will offer a vital life-line for businesses and a longed-for celebration of the countryside for like-minded people, marking the end of a very challenging time.”
Speaking from his home at Ragley Hall, Lord Hertford said: “The house and grounds at Ragley have had a varied and resilient past. Ragley served as a hospital in the last World War and went through a rigorous restoration period in the 1950s when my father brought Ragley back from a point of terrible repair to the estate you see today.