Files with sprite3 extension are pretty much certainly sprites (animated characters) for Scratch tool version 3.0 or later.
Software that open sprite3 file
SPRITE3 file extension - Scratch 3.0 sprite
What is sprite3 file? How to open sprite3 files?
File type specification:
List of software applications associated to the .sprite3 file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open sprite3 file, edit sprite3 file, convert sprite3 file, view sprite3 file, play sprite3 file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting sprite3 files.
Programs that can create sprite3 file - Scratch 3.0 sprite
Programs supporting the exension sprite3 on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Scratch for create sprite3 file action.