I've never known the market to be open on Sundays. They currently have a Saturday and a Tuesday market.
There is a Sunday market that they started this year. Its It's only the first Sunday of the month at The Avenue across from the Galleria. I think it only runs through Oct. Website is here: https://tgfarmersmarket.com
Only on Tuesday and Thursday in TGP. Other locations on various dates and locations.
They may or may not. The best way to find out is by contacting Tower Grove Park. I'm quite sure the park can fill you in on any inquiry about the park. Good luck!
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