Is there going to be any data loss if I delete a Canvas page? What should I be wary of before I delete a design?

Is there going to be any data loss if I delete a Canvas page? What should I be wary of before I delete a design?

There is going to be no loss of data if you delete a Canvas page. A Canvas view is a visual representation of data for better organization of the record detail page using the existing CRM data. Thus it doesn't account for any data gain or loss.