Season 3 was confirmed February 9, 2016. The third season premiered on January 7, 2017.
- 01/07/17 - Quad With a Blog (301)
- 01/14/17 - Odd Quad Out (302)
- 01/21/17 - Keeping Up With the Quadashians (303)
- 01/28/17 - The Great Mullet Caper (304)
- 02/04/17 - Quadsled (305)
- 02/11/17 - Ye Olde Hand Holde (309)
- 03/18/17 - What's the Worst That Quad Happen? (310)
- 03/25/17 - To Be Invited or Not to Be (313)
- 04/08/17 - Ele-Funk in the Room (307)
- 04/15/17 - Tween Wolf (308)
- 04/22/17 - This Little Piggy Went to the Harpers (306)
- 04/29/17 - I Want My Mae B. Back (311)
- 05/06/17 - The Buffa-Lowdown (314)
- 05/13/17 - The Quadshank Redemption (320)
- 05/20/17 - Not-So-Sweet Charity (318)
- 06/03/17 - One Quadzy Summer (319)
- 06/10/17 - Quad for Teacher (316)
- 06/17/17 - Quadpendence Day (315)
Unconfirmed Episodes Edit
- Aidan Gallagher as Nicky Harper
- Casey Simpson as Ricky Harper
- Mace Coronel as Dicky Harper
- Lizzy Greene as Dawn Harper
- Allison Munn as Anne Harper
- Brian Stepanek as Tom Harper
- Kyla Drew Simmons as Mae Valentine
- Hayden Crawford as Dooley
- Theodore Barnes as Miles
- Siena Agudong as Natlee
- Lincoln Melcher as Mack
- Sofia Wylie as June
- Isabella Revel as Avery
- This season had previews of episodes from September to November that will premiere in January.
- The theme song changes in this season.
- Matt Fleckenstein left the show.
- Kyla Drew Simmons who portrays Mae has been promoted from a recurring cast member to a main cast member.
- Mace Coronel's voice got deeper due to his puberty between Season 2 and Season 3 production.
- This season was ordered for 14 episodes on February 9, 2016 by Nickelodeon but later expanded to 24 episodes.
- Production for this season started on April 26, 2016.
- A new café from Get Sporty is introduced due to the episode Quad With a Blog where the old café burned down.
- The episode The Great Mullet Caper was the 50th episode produced.