Busch turned a lap at 120.083 mph around the half-mile, high-banked track for his second pole of the season and the 23rd of his Nationwide career. He will attempt to become the first driver to win three consecutive Nationwide races at Bristol.
Stenhouse holds an eight-point advantage over Sadler, while Reed Sorenson trails the leader by nine points. Sorenson will start 18th.
Johnny Chapman, J.J. Yeley, John Jackson, T.J. Bell, Jennifer Jo Cobb and Carl Long failed to qualify.
The 250-lap race at Bristol is scheduled to start just after 7:30 p.m. (et).