After what feels like an infinite wait, The Fault in Our Stars  finally hit the theaters this past weekend. Though the adaptation of John Green's novel is fantastic and full of fan-favorite scenes and quotes , not everything about Hazel and Gus's lives could make the leap to the big screen. So after you cry through the film, find out what was left on the page — including one moment that we'll see in the DVD extras.
Source: 20th Century Fox 
The Ambulance Poem
In the book, while Hazel and Augustus are waiting for the ambulance at the gas station (due to Gus's G-tube infection), she recites William Carlos Williams's "The Red Wheelbarrow" to him. This heartbreaking moment was altered in the movie, omitting the poem recitation, but keeping the rest of the scene intact.
Notably, the scene where Hazel discovers Gus wet the bed during the worst of his cancer is not in the film, either.
Gus's "I Love You" Speech
Though Gus's speech about loving Hazel is in both the book and the movie, the location is different. In the book, he proclaims his love on the plane, but in the movie, he does so at their Oranjee dinner. Their romantic dinner also takes place inside instead of outside in Amsterdam.
In the book, Hazel and her mom hear Gus crying and yelling at his mom when they pick him up for the trip, and he also disappears at the airport when they want to load Hazel on the plane first. In the movie, both scenes are omitted. Instead, Gus picks Hazel up in a limo, and the movie then jumps right to their plane's takeoff.
The Little Girl Trying on Hazel's Cannula
In the book, a little girl asks to try on Hazel's cannula in the mall, and Hazel lets her. The girl's mom apologizes for the moment. In the movie, this scene was cut, but an alternate version was shot featuring a cameo from author John Green! This moment instead takes place in the airport before Amsterdam, and Green plays the girl's dad. The scene will be an extra on the DVD.
Source: Twitter user realjohngreen 
"I'm a Grenade"
In the movie, Hazel says the "I'm a grenade!" line to her mom, whereas in the movie, she says it to Gus on the swing set. The memorable line is still there, just slightly changed.
Hazel and Van Houten's Interactions
Hazel and Van Houten's final interactions are slightly altered in the movie. In the book, Van Houten scares Hazel from the backseat of her car after Isaac tells her Gus is writing a sequel to An Imperial Affliction for her. After Hazel tells Van Houten to get sober and write another book, he goes home to Amsterdam and never speaks to her again. Instead, as Hazel becomes obsessed with finding Gus's writing, she realizes four pages of his journal are missing, which he had sent to Van Houten. This later leads Lidewij to force Van Houten to read the eulogy, and then she sends it back to Hazel.
In the movie, Van Houten shows up in Hazel's car after the funeral, and he tries to give her a letter without telling her what it is. He lets her know that he corresponded with Augustus, but not the details of their exchanges. She kicks him out of the car without any nice parting words about getting sober, and then later, Isaac tells her about the eulogy (instead of the Imperial Affliction sequel). She then finds Gus's crumpled-up letter she had thrown in her backseat and reads it.
Gus's Ex-Girlfriend, Caroline
In the book, Gus has an ex-girlfriend, Caroline, who died of brain cancer. Hazel doesn't want to hurt him by dying the way that Caroline did, so she tries to keep her distance. (We all know now that works out.) In the movie, she is cut out entirely. Augustus's extended family, including his sisters and their "banker husbands," are also not featured in the film.
Hazel's Friend, Kaitlyn
Hazel's friend Kaitlyn, who abandons her after she gets cancer, isn't in the movie. Instead, Hazel is portrayed as mainly hanging out with her parents.
Selling the Swing Set
In the book, Hazel and Gus sell her family's old swing set to be used at a loving home. He suggests, "Desperate lonely swing set needs loving home," as their headline, while Hazel wants to say, "Lonely, vaguely pedophilic swing set seeks the butts of children." This story line does not appear in the movie.