I, like countless others, cherished the film Carrie. My love for the film transcends the surface level. You see, I contend with personal battles of autism and mental health issues. My relationship with cinema has allowed me an escape, a sanctuary of sorts. The discovery that there exists a director's cut of Carrie was bittersweet. To know there's more of a film I adore capable of offering deeper solace is incredible. However, the fact it remains unseen is heartbreaking. That's why I'm reaching out today, to demand that Sony Pictures, MGM, and Kimberly Peirce release the director's cut of Carrie.

We aren't alone in this demand. Out of the 39,518 reviews on IMDB, many express a similar longing to view this unseen treasure (source: IMDb). The sheer popularity of the film (7.4/10 rating on IMDb and 93% on Rotten Tomatoes) further emphasises our collective right to view the director’s cut. The demand is present, and it is robust.

By releasing the director's cut, Sony Pictures, MGM, and Kimberly Peirce offer not just a extended version of a loved film, but a lifeline to those of us who find comfort and commiseration in the world of Carrie. Let's remind them that their films and decisions have a direct impact on the mental health and happiness of their viewers. Please, join me in making this call for the release of the Director's cut of Carrie. Sign the petition today.

I will now list all deleted scenes that the 2012 test screeners saw: 

The Locker Room Scene (Extended) - After Chris records Carrie on her cell-phone she than turns it toward herself and the Ultras.

The Town Destruction - After Carrie burns down the school and kills Chris and Billy she makes a trail of destruction toward the town of Chamberlain.

Wipe That Smile Off Your Face - When Chris notice Carrie smiling at Tommy she tells her to "Wipe That Smile Off Your Face".

The Prom Scene (Extended) - When Carrie unleashes her telekinetic powers and slams all the doors shut someone accidentally gets there fingers cut off from the doors and everyone runs to the doors to get out.

The Car Scene (Extended) - Billy's drives up to run over Carrie but she stops it with her telekinetic power while making a slightly evil smile.

The White Commission - Sue and all survivors testify about what happened.

Estelle Horan - Estelle Horan, now as an older woman testifies before The White Commission.

Found Footage Scenes - Freddy Holt´s camera is found and the authorities manage to reconstruct the footage, which also shows part of Carrie´s actions during the massacre.

The Prayer Closet Scene (Extended) - Margaret finally lets Carrie out of the closet and lets her go to her room.

Donna Kellogg - Donna is a friend of Chris and announces her through the internet about her intention on to sabotaging the prom and harming Carrie.

Chris & Carrie Outside The Dress Shop - After Carrie exits the dress shop she later confronts Chris by interacting with her.

Carrie & Miss Desjardin At The Prom - Miss Desjardin tells Carrie about her moment when she first attended her own Senior Prom.

Margaret Gets Out Of The Closet - Margaret eventually gets out of the closet by ripping a huge hole from the door.

Erika & George's Fate - George gets impaled by one of the star lanterns while Erika watches in horror.

Sue & Miss Desjardin Outside The School- After Sue sees Tommy's body being taken out by a stretcher. Miss Desjardin informs her about his death, which makes her determined to find Carrie.

Margaret's Original Death - Carrie kills her mother by stopping her heart with her telekinetic powers.

The Church Scene - Carrie goes to the church to pray before setting it on fire with her telekinetic powers.

The Bath Scene (Extended) - After Carrie comes home from the Prom she goes to take a bath to clean the blood off herself.

Carrie Outside The School - After Carrie exits the burning school she uses her telekinetic powers to kill off some of the prom survivors who had escaped.

Ms. Walsh & Carrie - Carrie and Ms. Walsh have a small brief interaction at the library.

The Mean Girls Teasing & Making Fun Of Carrie - Before Carrie goes to the bathroom a group of girls begin to tease and make fun of her.

Tommy & Sue's Backseat Love Scene (Extended) - Sue and Tommy make love at the backseat of his car.

Sue's Video Diary - Sue makes a video diary in her room and begins to documented about her daily life and thoughts about Tommy, Carrie, Chris, and the Prom.

Sue Calls Tommy - When Sue arrives at the school she tries to call Tommy to warn him about the prank but he rejects the call.

Chris & Billy Rushing From The School - After pulling the prank Chris and Billy rush out of the school only to find Sue's car parked in front of theirs and blocking it from them leaving.

Chris & Billy's Death Scene (Extended) - Carrie and Chris interact with each other one last time before killing them.

The Electrocution Sequence (Extended) - Carrie levitates all the dead and injured students and throws them out a window while everyone else get electrocuted.

Carrie Using Her Powers To Levitate The Books In Her Bedroom (Extended) - Carrie practices her telekinetic powers by levitating all the books in her room.

The Locker Room Video - The students use Facebook and Twitter to send each other the locker room video.

Margaret Follows Carrie - When Carrie goes upstairs to find her mother. Margaret hears her walking and begins to follow her.

The image you see is a found photo from IMDB This scene I’m assuming is Carrie killing the students outside. 
here is a scene from the teaser trailer of her destroying the town: https://m.imdb.com/video/vi1781770009/?ref_=tt_vi_i_2