| Unit Name: | Regimiento Suizo de Reding n.º 3 |
| Type: | Infantry |
| Branch: | Army |
| Dates: | 1742 - 1829 |
| Allegiance: | Crown of Spain |
| Specialization: | Front-line |
| Battles: | American Revolutionary War War of the First Coalition |
| Notable Commanders: | Theodor von Reding |
| Disbanded: | 1829 |
The 3rd Swiss Regiment Reding was a unit of Swiss soldiers in the Spanish Army and one of several Swiss regiments serving the Spanish Crown in the 18th century. The regiment was founded by a royal proclamation of Philip V in 1742 and recruited from the Canton of Schwyz in central Switzerland.
It was the third Swiss regiment in service at the time (out of about a dozen or so Swiss Regiments historically) and was the second raising of a regiment under Theodor von Reding. It is therefore either referred to as the 2nd Regiment Reding or the 3rd Swiss Regiment.