The Fajr-3 (rarely Fadjr-3[5]) (Persian: فجر-۳) is an Iranian heavy 240 mm intermediate-range[6] multiple-launch artillery rocket (MLRS).

The Fajr-3 launcher fires twelve 5.2 meter long, 240 millimeter-calibre Fajr-3 artillery rockets, with a range of 43 kilometres, weighing 407 kilograms each and carrying 90-kilogram fragmentation warheads with 45 kg of high explosive (HE).

[9] With North Korean assistance, Iran's state-run Shahid Bagheri Industries later began to produce the system[1] under license.

[3] Iranian Defense Minister Akbar Torkan announced in March 1990 that mass production of the Fajr-3 had started.

[14] Analysts in Abu Dhabi learned about the development less than a month later and described it as "one of the most important new weapons" entering production in Iran.

[4] This discrepancy in start date may be the difference between first building a copy, and then an improved version of the system.

[17] A complete Fajr-3 system is manned by a crew of five and also includes one dedicated resupply vehicle with a crane.

[3] The rocket's double layer propulsion burns for an average time of 4 seconds, reaching a peak velocity of 930 m/s.

[20] In 2018 Iran announced an assembly line for proximity fuses for a variety of rockets and guided missiles, including the Fajr-3.

[21] One source reports that Fajr-3 rockets can likely carry (plain) high explosive, submunitions, incendiary, smoke, or chemical payloads as well.

[2] When the Fajr-3 is reloaded, the launch tubes (in two groups of six) are detached from the launcher and laid on the ground by a crane.

[35] A Fajr-3 rocket was fired by unidentified Iraqi groups on September 11, 2007, and injured an American soldier in Baghdad.