Definition of Genre: a class or category of artistic endeavor having a particularform, content, technique, or the like: the genre of epicpoetry; the genre of symphonic music.
Some examples of Thriller Sub-Genres are below :
Disaster thriller: In which the main conflict is due to some sort of natural or artificial disaster, such as floods, earthquakes, hurricanes, volcanoes, etc., or nuclear disasters as an artificial disaster.
Crime thriller: This particular genre is a hybrid type of both crime films and thrillers that offers a suspenseful account of a successful or failed crime or crimes. These films often focus on the criminal rather than a policeman. Crime thrillers usually emphasise action over psychological aspects.
Mystery thriller: Suspense films where characters attempt solving, or involved in, a mystery.
Religious thriller: In which the plot is closely connected to religious objects, institutions and questions. While suspense stories have always shown a significant affinity for religion.
Supernatural thriller: In which the film brings in an otherworldly element mixed with tension, suspense and plot twists. Sometimes the hero and/or villain has some psychic ability.
Techno thriller: A suspense film in which the manipulation of sophisticated technology plays a prominent part.
Psychological thriller: In which (until the often violent resolution) the conflict between the main characters is mental and emotional, rather than physical.
Medical thriller: In which the hero/heroine are medical doctors/personnel working to solve an expanding medical problem.
Political thriller: In which the hero/heroine must ensure the stability of the government that employs him.