Class III
# Class III

Class III may refer to:

* Class III antiarrhythmic
* Class III β-tubulin
* Class III electrical appliance
* Class III gaming
* Class III NFA firearm
* Class III PI 3-kinase
* Class III railroad
* Luminosity class III (giant) star in the Yerkes or MK-system
* Pesticide Toxicity Class Class III
   * World Health Organization
   * United States Environmental Protection Agency
   * EU
