Sign in to your Dropbox account
Open the folder you want to delete
Click the three-dot menu next to the folder
Select Delete
Confirm the deletion
To delete a folder from the Dropbox mobile app:
Open the Dropbox app
Find the folder
Tap the three-dot menu
Tap Delete
Confirm the deletion
To delete a folder from Dropbox on the web:
Go to dropbox.com
Locate the folder
Click the three-dot menu
Click Delete
Confirm the deletion