If you drafted and saved a newsletter, you can always make edits or delete it before sending to families.
Edit or delete newsletter drafts
You can save a newsletter as as draft as long as it has a titled added. This teachers and admins to save their incomplete work and come back to it later.
All drafts can be found at the top of the Newsletter tab on the web by clicking Messages > Newsletters.
You'll see the option to Edit draft or Delete as needed:
Delete a sent newsletter
Once a newsletter has been sent it can be deleted from a student's message thread the same way admins delete other message types. This will not delete the newsletter from the saved newsletter section, only the students' message threads.
Visit Delete messages for steps on how to delete.
Note: Newsletters will also be removed from each thread that it was sent to when it is deleted from an individual thread.