Beethoven's 3rd is the second sequel to the 1992 film, Beethoven. Additionally, this is the third installment in the Beethoven film series. It was never given a cinematic release, being released directly to VHS, and later to DVD. The film marks the onscreen introduction of Judge Reinhold as George Newton's younger brother Richard. Julia Sweeney as Richard's wife Beth. Joe Pichler as Richard's son Brennan. and Michaela Gallo as Richard's daughter Sara
The movie takes place a few years after the events of the second film and the event at the mountains. The Newton family is on a cross country vacation in the USA to join a Newton family reunion in California and, in an unexplained move, Beethoven must travel there with George's brother Richard (Judge Reinhold) and his family of a nagging wife Beth (Julia Sweeney) and two bratty kids Sara (Michaela Gallo) and Brennan (Joe Pichler) as they hit the road to California in a huge, shiny and expensive RV, equipped with a DVD player. Following them are two bumbling criminals who have hidden some secret codes on a DVD that they figure no one in the world will buy (The Shakiest Gun in the West), but someone does: Richard. So now they've got a DVD holding top secret information and the criminals must get it back. They are not only in trouble with the criminals but with Beethoven also. But after he saves Sara from the criminals the family becomes very sad knowing they have to give him back. After they get to California they find out from Richard's Uncle Morrie that George, Alice, and the kids will not be coming because of business reasons in Botswana which means they need extend their visit for another year.