Three Days Grace is the debut album by the Canadian rock band Three Days Grace, released on July 22, 2003, through Jive Records. It was the band's only album as a trio.

Produced by Gavin Brown, the album achieved commercial success, peaking at number 9 on the Canadian Albums Chart and number 69 on the Billboard 200. It received a Gold certification in New Zealand, a Platinum in Canada and triple-Platinum status in the United States.

Prior to being named Three Days Grace, the band was known as Groundswell. They became acquainted with local producer Gavin Brown and gave him several years' worth of material which they had created. Working with the group, Brown said, "It was really about being in the right place at the right time. You try to do all the right things day-in and day-out, and be dedicated to the craft, but when it's all said and done the final element is luck." The band garnered the attention of many record labels after the release of their demo, largely due to the song, "I Hate Everything About You". Eventually, Three Days Grace signed with Jive and began recording their debut album in Massachusetts. The single "I Hate Everything About You" was released in promotion for the album.

According to drummer Neil Sanderson, the album's material comes from the "crazy things" the group had seen growing up. Singer Adam Gontier stated, "I don't find it easy to write about happy shit. You don't need a release when you're happy." The group completed half of the album at Long View Farm in North Brookfield, Massachusetts, while the rest was done at Bearsville Studios in Bearsville, New York. The album's theme deals with "growing up in a small town, being bullied around and everybody knowing your business."

The band began touring with Trapt in July 2003, in support of the album. During this tour, the group added a new member, guitarist Barry Stock, who joined the band after they held auditions for another guitarist. The group later joined Nickelback on The Long Road Tour throughout October and November 2003. The band embarked on a headlining tour called the Three Days Grace World Tour in 2004. They also supported Evanescence on a North American tour in July 2004 and Hoobastank on the Let it Out Tour in November 2004. In October 2004, the band re-released their debut album with a bonus DVD that contained, music videos of their singles, behind the scenes videos, backstage footage and concert clips shot in Brazil.

The group spent roughly six months to record the album, while the songs on the record were written over the course of ten years. On "I Hate Everything About You", the band recorded two guitar parts for the song, the main guitar part and intro riff. The opening riff was recorded on a Yamaha acoustic through an Amp Farm and the group liked the way it sounded with the acoustic guitar and ended up using it on the final production. On the fourth track, "Home", the band was coming up with different ideas and lead parts "that might sound cool," according to Gontier. They eventually recorded a high-pitch guitar lead that can be heard at the beginning of the song. They used a whammy pedal to "bring the whole tone up a whole octave," which was played around the 12th fret. On the album's lead track, "Burn", the band was in the studio and started "dumping a jar of pennies on a guitar," according to Sanderson. They added some distortion which sounded like fire and the band thought it fit the title of the track really well.

The album was met with positive reviews from most music critics. Heather Phares of AllMusic gave the album a positive review, saying, "Although this debut is a little uneven, it's also promising. Three Days Grace are definitely one of the most accessible alt-metal bands of the 2000s; they just need to add some more distinctiveness to their sound." She praised the group's songwriting on tracks such as "Born Like This", "Just Like You", and "Scared". She also called the album's lead single, "I Hate Everything About You", the band's "best song, gaining most of its power from its directness and bluntness in examining a dysfunctional relationship." Dave Doray of IGN gave another positive review, remarking, "almost every single song from the Three Days Grace track list is heavy and catchy, with chewy chunks of assurance and fury thrown in for added measure."

Kaj Roth of Melodic stated, "Three Days Grace plays tough modern rock, standing on classic hard rock ground like a mix between Depswa and Shinedown." He complimented the song "Scared" for its guitar harmonies calling it, "real refreshing." However he was critical on the tracks, "Burn" and "Now or Never" for the lack of "good melodies." In a mixed review, Rough Edge compared the group's sound to Finger Eleven and Trapt stating, "Sanitized for mass consumption, there's nothing about Three Days Grace that we haven't heard before from other anguished, mid-tempo rock acts of the last ten years." Another mixed review was written by Andy Lee of Chart Attack who wrote, "Opener 'Burn' begins with promising rhythmic riffage, if only for its obvious debt to early Rage Against the Machine. From there on in, things head south with a series of gloomy, derivative hard rock numbers that ultimately coalesce into an ungodly amalgam of guitar slop, radio-friendly verse-chorus-verse arrangements and lead singer Adam Gontier's angst-ridden laments." Spin gave a more negative review calling the album, "generic Canadian gripe rock."