De Newtons gaan met de kampeerwagen op vakantie. Vader Richard is bijzonder opgetogen, maar de kinderen vinden zo'n lange rit maar niks, tot er plots een onverwachte lifter opduikt: Beethoven!!! Beethoven zorgt naar gewoonte weer voor een heleboel verrassingenen pret, maar wanneer twee stuntelige dieven het pad van de Newtons kruisen, is hij het die de familie beschermt en verdedigt.
Nee, helaas is Beethoven's 3rd nog niet beschikbaar op Netflix in Nederland.
| Directing | David Mickey Evans | Director |
| Crew | Paul E. Short | Stunts |
| Writing | Jeff Schechter | Writer |
| Writing | John Hughes | Characters |
| Writing | Amy Holden Jones | Characters |
| Directing | Brent Clark | Second Assistant Director |
| Crew | Gary J. Wayton | Stunt Coordinator |
| Production | Donald Paul Pemrick | Casting Director |
| Production | Dean E. Fronk | Casting Director |
| Sound | Philip Giffin | Original Music Composer |
| Editing | Harry Keramidas | Editor |
| Art | Chester Kaczenski | Production Design |
| Camera | John B. Aronson | Director of Photography |
| Production | David Bixler | Producer |
| Production | Kelli Konop | Producer |
| Production | Kelli Konop | Unit Production Manager |
| Directing | Marco Black | First Assistant Director |
| Directing | Melanie Grefé | Second Assistant Director |
| Costume & Make-Up | Bonnie Stauch | Costume Design |
| Art | Marc Dabe | Art Direction |
| Art | Judi Giovanni | Set Decoration |
| Costume & Make-Up | Dean Sadler | Key Makeup Artist |
| Costume & Make-Up | Elizabeth Sloan Freel | Key Hair Stylist |
| Lighting | Giovani Lampassi | Gaffer |
| Crew | David Waine | Special Effects Coordinator |
| Crew | David Hugghins | Stunts |
| Crew | Danny Downey | Stunt Double |
| Crew | David Brian Martin | Stunt Double |
| Camera | Nathaniel Goodman | Camera Operator |
