[7] On September 3, 2015, vocalist Scott Lewis stated during an interview that the band will be releasing their new album in the summer of 2016.

Jessica Howkins of Distorted Sound scored the album 9 out of 10 and said: "Deathcore is a falling genre, many are forgetting its existence whilst others are moving on, but it is bands like Carnifex when they release titans such as Slow Death that keep it alive.

"[14] KillYourStereo gave the album a positive review and stated: "While I can recommend Slow Death, I feel as though the very expectations and hype set by Carnifex hasn't come to full fruition.

"[16] Metal Injection rated the album 8.5 out of 10 and stated, "Slow Death is a solid, atmospheric, and a most of all HEAVY release.

"[17] Ali Cooper of Rock Sins rated the album 8 out of 10 and said: "Slow Death is no calculating innovation or threatening game changer, simply a self-assured proof of Carnifex's magnetic presence.