Red Bull's four-time world champion Max Verstappen, the other title contender, will start Saturday's race in sixth position behind teammate Yuki Tsunoda in fifth.
"Nice to be back. Thanks everybody," said Australian Piastri over the team radio.
Norris leads Piastri and Verstappen by 24 points with a total of 58 still to be won and eight available to the sprint winner.
George Russell starts second for Mercedes and Aston Martin's Fernando Alonso qualified fourth.
More to follow...