The 2020 Thomas Cup group stage was held at the Ceres Arena in Aarhus, Denmark, from 9 to 14 October 2021.
The group stage was the first stage of the 2020 Thomas Cup. The two highest-placing teams in each group advanced to the knockout stage.
The original draw for the tournament was conducted on 3 August 2020, at 15:00 MST, at BWF Headquarters in Kuala Lumpur. BWF then decided to redraw the tournament after the postponement from 2020 to 2021 this time to be conducted on 18 August 2021, at 15:00 MST also at the BWF headquarters in Kuala Lumpur. The 16 teams were drawn to four groups of four and were allocated to three pots based on the World Team Rankings of 18 February 2021.
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