Question about Samsung Gear S3 Frontier

Water and dust protected

With IP68 certification*, it is protected against dust and dirt and can be submerged in water up to 1.5 metres deep for up to 30 minutes.
* No protection in salt water and other liquids, especially soapy water, alcohol and/or heated liquid. Note that the genuine leather strap, being an organic material, may naturally react to water.

Info from : http://www.samsung.com/ch...

So according to your question, more likely to be in the "splash resistant" category. Not a diver's watch.