Can I use maps on series 3 Apple Watch without wifi or iPhone?

Hi

No, the GPS feature and built-in Maps app cannot be used for navigation purposes when using the Apple Watch without the paired iPhone and access to data.

You may find that a third-party app meets your needs. For example, ViewRanger:

• "Store routes and related offline maps on your Apple Watch"
• "Follow routes, record tracks, or navigate in map-only mode"
• "Explore offline without mobile or data connection"

More information:

ViewRanger on the App Store

http://www.viewranger.com/en-us/features/apple-watch

You're welcome! 🙂