Is there a way to see deleted comments on Trello? Like a script or anything I can do?

[Nasty]

This is really important, I need to see deleted comments somehow because it is not in the logs.

[Iain Dooley]

@Nasty no deleting a comment is permanent and also removes it from the action history of the card (even via the API).

If you want to avoid this happening in future you could use this Trellinator command to store every comment made in a Google Sheet:

https://gist.github.com/iaindooley/6dd55708931b36ff009057b4c7e6b005

You can read more about Trellinator here:

https://community.atlassian.com/t5/Marketplace-Apps-Integrations/Introducing-Trellinator-Automate-Trello-with-Google-Apps-Script/ba-p/925271