The Super Saiyan 3 formEditWhere the third stage of Super Saiyan's purpose was 100% utilization of physical stamina, the purpose of the Super Saiyan 3 transformation is to increase the utilization of ki, and as a result, the transformation rapidly consumes the energy of the user, which leads to extended levels of fatigue, even long after powering down. If the user has died and is not encumbered by a living body, this strain is reduced somewhat, and additional energy depletion is minimized (such as in Goku's case). The difference between Super Saiyan 3 and Super Saiyan 2, its predecessor, are immediately noticeable as speed, strength and endurance are all pushed past normal limits. The first time that Goku used this form on Earth, its power caused tidal waves and hurricanes and nearly shook the planet apart. (His subsequent transformations to the form were controlled enough to prevent such dramatic side-effects.) In addition, this power could be sensed even as far as the distance between Earth and Supreme Kai's planet, something that not only shocked Supreme Kai, Kibito, and Gohan, but worried them as well. According to the Daizenshuu, the Super Saiyan 3 form gives the user four times the strength of a Super Saiyan 2.
However, with the enormous power, there are some very serious setbacks. For example, when Goku showed Babidi and Majin Buu the form, he cut his remaining temporal revival energy in half, and his third usage that was present only in the anime (as it was implied that he first achieved Super Saiyan 3 while training on Grand Kai's planet) had him return to Other World completely (in the manga however, Baba only told Goku that he had half an hour left, and he simply spent the remainder of his time before traveling back). Likewise, when Super Saiyan 3 Goku attempted to regain energy while Vegeta and Mr. Satan distracted Kid Buu, he was unable to recover the strength needed, thus draining his power completely and leaving him in a weakened, normal state where he could not even control the Spirit Bomb until his power was restored by the Namekian Dragon Balls. Goku himself had little experience with the transformation, and performing it twice in a short time brought him to his knees and expended all of his remaining energy. (In the manga, he does not revert to his original form until after Vegeta intervenes to buy him the minute that he needed, however.) The time is reduced even further when he is turned back into a child in Dragon Ball GT, where he can only hold the transformation for a couple of seconds. This limit was lifted somewhat after Goku's tail was restored with the help of Elder Kai, allowing him to sustain the form for a longer duration, though he was still no match for Super Baby Vegeta in this state.