The third-generation iPhone SE is a smartphone designed and developed by Apple Inc. It is part of the 15th generation of the iPhone, alongside the iPhone 13 and 13 Mini and iPhone 13 Pro and 13 Pro Max models. Apple announced the third-generation iPhone SE on March 8, 2022, as the successor to the second-generation iPhone SE. Pre-orders began on March 11, 2022. The phone was released afterwards on March 18, 2022. It was released with a starting price of US$429, a $30 increase over its predecessor.

The iPhone is a line of smartphones produced by Apple that use Apple's own iOS mobile operating system. The first-generation iPhone was announced by then–Apple CEO Steve Jobs on January 9, 2007. Since then, Apple has annually released new iPhone models and iOS updates. As of November 1, 2018, more than 2.2 billion iPhones had been sold.