The third season of the television comedy series Mom began airing on November 5, 2015, on CBS in the United States. The season is produced by Chuck Lorre Productions and Warner Bros. Television, with series creators Chuck Lorre, Eddie Gorodetsky and Gemma Baker serving as executive producer.
 The series follows Christy Plunkett (Anna Faris), a single mother who—after dealing with her battle with alcoholism and drug addiction—decides to restart her life in Napa, California's wine country working as a waitress at the restaurant Rustic Fig and attending Alcoholics Anonymous meetings. She lives with her mother Bonnie Plunkett (Allison Janney), who is also a recovering drug and alcohol addict, as well as her teenage daughter Violet (Sadie Calvano), who was born when Christy was 16years. Christy also has a younger son Roscoe (Blake Garrett Rosenthal) by her deadbeat ex-husband Baxter (Matt Jones). Other prominent character in the series is the wise Marjorie (Mimi Kennedy), Christy and Bonnie's friend and co-Alcoholics Anonymous member. Jaime Pressly and Beth Hall, who play co-Alcoholics Anonymous members Jill and Wendy, respectively, were upgraded to series regular status for this season. The episodes are usually titled with two odd topics that are mentioned in that episode.
 Season three of Mom aired Thursdays in the United States at 9:00 p.m. after Life in Pieces in the fall and The Odd Couple in spring.
 The season received positive reviews from critics and Allison Janney was nominated a Primetime Emmy Award for her performance.
  
 Christy and Bonnie have different ideas about forgiveness when Bonnie's birth mother Shirley (Ellen Burstyn), who abandoned her as a small child, suddenly seeks them out, wanting to be a part of their lives.
 Sensing a shadow of their former selves, Christy and Bonnie try to help Jodi (Emily Osment), a teenage addict they met at their meeting. Meanwhile, Christy ends up getting fired from her manager position after asking Claudia for a raise, and is forced to return to waitressing. The episode ends with a To Be Continued screen.
 Christy and Bonnie take Jodi in and help her get on her feet: after three months, when they return her to her sister, they decide to continue helping other struggling alcoholics, but their first rescue, Michelle (Judy Greer), becomes more problematic than they had anticipated when she sobers up.
 Christy is overjoyed when Violet asks for the chance to repair their relationship, but things start to go wrong when Christy accidentally reveals Violet's past pregnancy to her fiancé Gregory (David Krumholtz). Meanwhile, Bonnie tries to end the old feud between her and her nemesis Beverly (Amy Hill).
 Christy becomes paranoid and jealous when Baxter's girlfriend Candace starts acting more like a mother to Roscoe, which only gets worse when Baxter reveals his intentions to marry her. Meanwhile, Bonnie is trying to start dating again, so she sets her sights on fellow AA member Steve (Don McManus), the lawyer that Christy works for.
 Christy and Bonnie aren't sure how to handle things when Regina begins drinking moderately, and even more so when Regina's life keeps getting better outside of any association with AA.
 While Bonnie struggles to move forward in her relationship with Steve, Christy has trouble establishing boundaries with her mentees, who incessantly keep trying to get in touch with her. Naturally, these problems come to light, as the family tries to host a traditional Shabbat dinner for Violet's judgmental future mother-in-law, Phyllis (Linda Lavin).
 Now that she is engaged to Baxter, Candace suggests a lunch at the golf club with Christy and Bonnie to ease the friction between them. The three seem to get along for once, when Candace's wealthy father Fred (Harry Hamlin) stops by the table and takes an interest in Christy, which thrills Bonnie but angers Candace. The episode ends with a To Be Continued screen.
 Christy and Fred's future together is in jeopardy after Christy is put off by how Fred treats Candace, even though she still dislikes Baxter's beloved. Meanwhile, Bonnie revels in the fact that her daughter is dating a wealthy man.
 Bonnie wants to go to a different AA meeting because she thinks Steve keeps looking at her funny. She and Christy attend a meeting geared to the LGBT community where Bonnie runs into Christy's "Aunt" Jeanine (Rosie O'Donnell), a lesbian that Bonnie lived with (and slept with) for two years when she was desperate for a home.
 Christy tries to help a recently sober man named Julian (Joe Manganiello) get back on his feet, but finds her attraction to him impairing her best intentions. Meanwhile, Bonnie accompanies Jill to a charity gala that the latter says was once the highlight of her year, only to find when they arrive that the guests are not so quick to forget Jill's past alcohol-induced behavior.
 Jodi tells Bonnie and Christy she is dating a fellow addict who is only six weeks clean, which worries the women. Marjorie announces she will marry Victor (Jonny Coyne), and that the wedding is in a week because they want it done before they go on vacation together. The girls, including Jodi, hold a bachelorette party for Marjorie, where they try to get Victor's sister Anya (Rhea Perlman) to like her. Jodi does not show up for the wedding ceremony, and Christy later gets a call from the police telling her that Jodi has died from a drug overdose, leaving her and the other friends shocked and in tears.
 As the ladies try to process Jodi's death, Marjorie is furious that Christy didn't tell her about it until she returned from her honeymoon. Meanwhile, Bonnie convinces Christy, Wendy and Jill they can make a huge profit smuggling a barrel of pure maple syrup back from Canada.
 Bonnie has a health scare when Steve sees a suspicious mole on her buttock during sex. A doctor removes it for a biopsy, but tells Bonnie and Christy the results will take a week. Fearing the worst, Bonnie starts making a bucket list of things she has never done "while sober". This includes agreeing to marry Steve. When the doctor says the mole was cancerous but he was able to remove it all, Bonnie nixes the engagement.
 Christy finds herself being attracted to Baxter again, especially after he complains about his upcoming wedding to Candace. Christy takes in a movie and ice cream with Baxter and Roscoe, where Baxter talks about how nice it would be if the three were a family again. Bonnie warns Christy that Baxter is a better man mainly because of Candace's influence, and that he'd turn back into his old self if he was with Christy.
 When Christy is laid off from the restaurant, Jill offers her a job as a personal assistant and companion, but things get out of hand when Christy can't stop pushing for details about Jill's personal life. Meanwhile, a wrong number results in Bonnie developing a sudden friendship with an unknown man, but when they finally decide to meet, he loses his nerve and disappears...in a wheelchair.
 First appearance of: William Fichtner as Adam
 After Adam (William Fichtner) explains over the phone why he backed out on their first date, Bonnie gives him another chance. They have a great time on their first real date and plan to see each other again – until Christy soon learns from a work colleague that Adam was notorious for cheating on his girlfriends, and she doesn't know how to break the news to Bonnie.
 Travis (Jesse Luken), the boyfriend who did drugs with Jodi when she died, shows up at a meeting. An angry Christy confronts him, driving him away. Marjorie and Bonnie convince Christy that Jodi's addiction killed her, not Travis, so Christy makes her amends. Meanwhile, Adam can't understand why Bonnie needs to go to AA meetings so often, until Bonnie shows him a videotape of her drunken antics at Christy and Baxter's wedding.
 Adam is embarrassed to tell Bonnie he doesn't want to go to a reunion of his old film crew colleagues, because he's afraid they will just show pity on him. She convinces him to go, and while there, Adam is offered a job as stunt coordinator for a new movie – but the filming will be done in Croatia. Meanwhile, Christy is hospitalized with pneumonia (and terrified of Wendy's angry, authoritative behavior as an ER nurse) but resolves to get to her pre-law final exam even if it kills her.
 Special guest star: French Stewart as Chef Rudy
 Christy is ecstatic over passing her finals with straight As and making the dean's list, but Bonnie goes out of her way to insult and belittle Christy's achievements and things get ugly between them until Bonnie sort of apologizes for being jealous.
 When a tearful Violet returns home after having both her engagement and heart-broken, Christy goes to confront Gregory, but she comes to realize that Violet might be the one with the problem.
 When Christy's hard realities regarding college costs and her daughter's broken engagement and marijuana use begin overwhelming her, Bonnie attempts to make some quick money re-selling items (clearing out Jill's over-stocked garage in the process). Christy faces her fears by presenting her case at a scholarship award meeting – and tries to finally have a happy birthday.
 Review aggregator website Rotten Tomatoes reports that 100% of nine critics gave this season a positive review; the average rating is 8.33/10. The season averaged 82 out of 100, based on four critics, on Metacritic, indicating "universal acclaim".