|Season 1||Season 2||Season 3||Episode Guide|
Season 3 of Sydney to the Max was announced on November 21, 2019. Production was scheduled to begin on March 14, 2020 but did not, due to COVID-19. Filming began on October 13, 2020 and wrapped on May 12, 2021. The season consists 21 episodes. The season premiered on March 19, 2021, and concluded on November 26, 2021.
On December 31, 2021, Ruth Righi confirmed Sydney to the Max would not return for a fourth season.
On April 1, 2022, it was reported by TVLine that the series had concluded after three seasons.
Sydney and her friends, along with Young Max and Leo in the '90s, embark on eighth grade and take on challenging and relevant issues such as struggles with cultural identity, trying to fit in, coping with divorce and the impact of microaggressions.
- Ruth Righi as Sydney Reynolds (21/21)
- Ava Kolker as Olive Rozalski (20/21)
- Jackson Dollinger as Young Max Reynolds (21/21)
- Christian J. Simon as Leo Webb (17/21)
- Ian Reed Kesler as Adult Max Reynolds (21/21)
- Caroline Rhea as Judy Reynolds (21/21)
- Amelia Wray as Sophia
- Julia Garcia as Emmy Mendoza
- Brogan Hall as Bucky
- Connor Falk as Harry
- Arjun Sriram as Pete
- Rizwan Manji as Vice Principal Virmani
- Cassidey Fralin as Young Alisha Reynolds
- Carlease Burke as Grandma Maya
- Audrey Cymone as Kendra
- Paul-Mikél Williams as Ned
- Aniya Simone as Lexi Parker
- Tijuana Ricks as Pastor Moore
- Ayaamii Sledge as Essence
These are confirmed episodes with dates to them.
- 03/19/21 - Tearin' Up My Room (301)
- 03/26/21 - A Few Good Mentors (302)
- 04/02/21 - He's All That (303)
- 04/09/21 - Three Amigas and a Harry (304)
- 04/16/21 - Boy Story (305)
- 04/23/21 - My Own First Enemies (306)
- 04/30/21 - The Hair Switch Project (309)
- 05/07/21 - The Bat Mitzvah Planner (307)
- 05/14/21 - Man! I Feel Like a Genius (310)
- 06/04/21 - What's Eating Olive Rozalski? (311)
- 06/11/21 - Do the Write Thing (312)
- 06/18/21 - Cool Intentions (313)
- 06/25/21 - A Crush of Their Own (314)
- 10/08/21 - The Hunt for Rad October (308)
- 10/15/21 - Jingled Out (315)
- 10/22/21 - Honey, You Shrunk the Fit (316)
- 10/29/21 - Family Buy (317)
- 11/05/21 - My Cousin Lexi (318)
- 11/12/21 - Praise Your Voice (319)
- 11/19/21 - Pie Hard (320)
- 11/26/21 - Any Given Sunday Brunch (321)
- The show was cleared for a third season ahead of Season 2's release, making it the second live-action series on Disney Channel to be renewed ahead of a season's release in 2019 with the first being Gabby Duran & the Unsittables.
- Production on the season was set to begin on March 14, 2020, but due to COVID-19, it was delayed indefinitely. Production started on October 13, 2020, and wrapped on May 12, 2021.
- Due to COVID-19, the season 3 picture is an un-used photo from the season 2 photo shoot.
- There is a Halloween episode this season. This marks the second holiday-themed episode in the series.
- The flashbacks in this season are taking place in 1993.
- Microaggressions are discussed this season in the episode "Do the Write Thing".
- Self-esteem and body positivity is discussed in the episode "Honey, You Shrunk the Fit".
- Episodes 1-8 of season three began streaming on Disney+ on May 28, 2021.
- Episodes 9-13 of season three began streaming on Disney+ on July 30, 2021. 
- Episodes 14-21 of season three began streaming on Disney+ on December 8, 2021.
- Christian J. Simon who portrays Leo Webb, is partially absent for some episodes this season, due to his role in the remake of the 1997 Disney Channel Original Movie; Under Wraps.
- The subplot this season features a more serialized narrative focusing on Max's crush on Alisha and how he confessed his feelings to her and they became a couple.
- Sydney gets a new hairstyle as of "The Hair Switch Project".
- The season will take a break, beginning after episode thirteen, which premiered on June 25, 2021.
- The series finale aired on the same day as the series finale of Gabby Duran & the Unsittables.
- This is the second time 2 series finales have premiered on the same night, as Jessie and I Didn't Do It have also aired their series finales on the same night (October 16, 2015).