If you're talking about a project report, last note does just that.
An alternative is a notes report, filtered by a project. This will give you everything.
You'll need to work through a few more filters to exclude certain notes, otherwise your last three may well be (no text added to update). Trawl through the notes to get a feel for what you could exclude.
As a note report, you'll get one row per note rather than one row per project, but you could group by project ID (or name)