Deceptacon is a death and nu-metal band from Foz do Iguaçu, Paraná, Brazil, formed in 2009. The band is an active part of the Foz do Iguaçu underground metal scene and has performed alongside regional acts from Brazil, Paraguay, and Argentina. They have released music independently and are noted for blending aggressive death metal elements with nu-metal influences.

Decessus is a progressive death metal band from Santiago, Chile, founded in 2020 by vocalist Ignacia Fernandez. The band fuses technical death metal precision with progressive songwriting, creating compositions that balance brutality with musical sophistication. Their emergence from Chile's vibrant metal underground has brought fresh energy to the South American extreme metal scene.

Dechristianize was a black metal band from Graneros, O'Higgins, Chile, operating with anti-Christian and Satanic lyrical themes. The band released the demo 'El Origen de la Extinción Cristiana' in 2004 and included members performing under pseudonyms including Sarcass, Lord Impurath, Abhor, and Filosofo.

Decimator is a thrash metal band from Porto Alegre, Rio Grande do Sul, Brazil, founded in 1999 with the aim of playing fast, aggressive, old-school-influenced thrash. The band released their debut full-length "Killing Tendency" in 2007, followed by "Bloodstained" in 2011, and their third album "Alienist" in January 2020 via Thrash or Death Records. Their music draws on themes of violence, war, psychopathy, and conspiracy.

Declínio is a black/death metal trio from Assis, São Paulo, Brazil, formed in 2022, with members drawn from the bands GURO, REIKETSU, and YALDABAOTH. The band blends influences from grind, doom, and post-metal alongside extreme metal, channeling themes of mental chaos and death. They released the album "Natureza Estatal" in 2022 and a second record, "Talking With Ghosts," on their Bandcamp page.

Deconstructed is a groove metal and metalcore band from Rosario, Argentina, whose lineup includes vocalist Walter Magnavachi, guitarists Andrés Ludmer and Guillermo Sarasibar, bassist Bruno Perine, and drummer Bruno Rositto. The band cites heavy influences from Pantera, Meshuggah, Sepultura, and Lamb of God, channeling a crushing, riff-driven sound rooted in Rosario's underground heavy music scene.

Deep Hatred is a death metal band from São Luís, Maranhão, Brazil, originally formed in 2018 and reconstituted as a quintet in 2021 with a revised lineup. The band draws on both old-school and brutal death metal and addresses themes of humanity's worst deeds through a sound they describe as grotesque and direct. Their EP "Virus Hominum" was produced at KM4 Studio and released in August 2022 through Anaites Records and Metal Island.

Deep Memories is a melodic doom/death metal one-man project from Americana, São Paulo, Brazil, created by musician and producer Douglas Martins. The debut album "Rebuilding the Future" was released in 2018 simultaneously in Brazil, Japan, and Russia, and the second album "Why Do We Suffer?" followed in September 2022. In April 2023, Martins expanded the project to a live band and performed alongside Portugal's Moonspell.

Deep Silence is a doom/death metal band from Salvador, Bahia, Brazil, active in the city's underground extreme metal scene. The band performs death-doom in a style reminiscent of 1990s acts, featuring guttural vocals layered over keyboards and melodic guitar work. They have contributed to Brazilian doom metal compilations and are listed in the Encyclopaedia Metallum under their Salvador origin.