The Spinosaurus in “Jurassic Park III” was not killed and its ultimate fate is not shown in the movie.
In “Jurassic Park III,” the Spinosaurus is introduced as a new and formidable predator on Isla Sorna, the island where the story takes place. This dinosaur quickly establishes itself as a major threat to the main characters when it attacks their plane, causing it to crash. Throughout the film, the Spinosaurus engages in several encounters with the human characters and battles other dinosaurs, including a Tyrannosaurus rex, which it kills in a confrontation early in the movie.
The Spinosaurus is depicted as highly aggressive and persistent in its pursuit of the protagonists, Dr. Alan Grant and his companions. Despite its numerous appearances and the danger it poses, the Spinosaurus does not meet its end in the film. Its last appearance is when it is distracted by the ringing of a phone swallowed by a mercenary earlier in the film, allowing the main characters to escape.
The film does not provide any information about what happens to the Spinosaurus after its final encounter with the humans. Its fate remains unknown, as it does not appear in subsequent films, and there is no further mention of it in the franchise. The absence of the Spinosaurus in later movies has led to much speculation among fans, but without official canon material addressing its fate, the Spinosaurus’ ultimate outcome after the events of “Jurassic Park III” remains a mystery.