Diabolical Mind is a metal band from Teófilo Otoni, Minas Gerais, Brazil, whose sound evolved from black metal in its early period toward death metal in later years. The band's logo was notably designed by renowned metal artist Christophe Szpajdel, and their lyrical themes center on Satanism, blasphemy, and hatred. The project has gone through multiple active periods throughout its history.

Diabolical Possession is a death metal band from Pindamonhangaba, in the state of São Paulo, Brazil, playing extreme metal with strongly anti-Christian lyrical themes. The band released the demo "Caos Caos" in 2005, featuring tracks such as "Gates of Hell" and "Exorcising Jesus Christ," and has appeared on local bills alongside international acts including Cannibal Corpse. They have remained active in the Brazilian underground death metal scene since their formation.

Diabállein is a black metal band from Monte Alto, São Paulo, Brazil, whose name derives from the Greek root of the word "diabolos," and who cite influences including Sarcófago, Darkthrone, Mayhem, and Venom. The band released their fourth full-length album, "Anti Sacra," in early 2025, recorded at Arte Estúdio in Monte Alto and distributed through Sangue Frio Produções.

Diagnose is a political grindcore band from Fortaleza, Ceará, in northeastern Brazil, blending elements of crust punk, grindcore, and death metal with socially charged, anti-system lyrical content. The band released the demo "Desordem Capital" in 1998 and has built a discography spanning several decades, including the albums "Neurose XXI" (2005) and "Cidade Objeto" (2021). They are among the more enduring extreme underground acts from the Brazilian northeast.

Diarrea is a goregrind act from Bahía Blanca, Argentina, active since 2019 in the country's underground extreme metal scene. They released the album Vamos de culo in July 2019 and followed it with Excrement deliverance in August 2021, both available via Bandcamp. The band maintains a presence on social media under the name Diarrea Goregrind.

Diatort was a death/thrash metal band from Passos, Minas Gerais, Brazil. Rooted in the extreme metal underground of the Brazilian interior, the band blended aggressive thrash riffing with death metal brutality before eventually splitting up.

Diatribes is a death/thrash metal band from São Paulo, Brazil, formed in 2014 by guitarist Gladyson Rivero alongside vocalist Danilo Luna, bassist Sérgio Roma, and drummer Rodrigo Biffi. The band blends aggressive thrash riffing with death metal brutality, and in 2025 signed with US label Brutal Records, releasing their debut full-length "Degenerate" in 2026.

Diavok was a death metal band from Porto Feliz, São Paulo, Brazil, formed in 2021. The band released a self-titled debut demo, "Demo I," in March 2021 before splitting up.

Dicephalus is a death metal and goregrind project from Indaiatuba, São Paulo, Brazil. The project released the album "Pathological Atrocities in Clandestine Hospitals" through Cemitério Records and Rotten Foetus Records, a seven-track release fixated on pathology, disease, and corpse decomposition in the vein of brutal goregrind.