Diascorium is a technical death/black metal band from Leeds, England, active since 2010. They deliver technically demanding extreme metal from West Yorkshire.

Diathesis is a London-based technical death metal band formed in 2010, featuring vocalist Ross Hurrell and guitarist Paul Voulgaridis among their lineup. Their debut release The Inception showcases a blend of technical death metal and progressive metal influences across six tracks of intricate, aggressive material.

Diatomorph is a doom and post-metal band from Belgrade, Serbia, formed in 2025. The project crafts atmospheric post-metal landscapes with doom metal weight.

Diatonic is a death metal band from Sweden, formed in 2020. The project delivers aggressive Swedish death metal.

Diatrekhon Aster is a depressive suicidal black metal band from Athens, Greece, formed in 2017 by vocalist Methanal, multi-instrumentalist VII, and drummer Leliel. Self-described as "urban depressive suicidal black metal art," their releases Metroglodyte, An Ecosystem of Utility Poles, and Sons of the Lone Wolf explore the mental struggle of human existence within the cityscape.

Diatryma is a death and thrash metal band from Uppsala, Sweden, formed in 2024. The project fuses death metal with thrash velocity.

Diavola plays groove metal and metalcore from Oslo, formed in 2022 and bringing a feminine Italian devil-name to Norway's diverse extreme metal scene. Their rhythmic, breakdown-heavy approach channels the confrontational energy of both genres through the Norwegian capital's cosmopolitan lens.

Diavolos is a death/black/thrash metal band from Greece, featuring Tas Danazoglou (Satan's Wrath, ex-Electric Wizard) and Taneli Jarva (ex-Sentenced, ex-Impaled Nazarene). Their 2015 album You Lived Now Die, released through Hells Headbangers, delivers ten tracks of filthy 1980s-inspired extreme metal drawing from Bathory, early Onslaught, and Possessed.

Dicentress is a band from Eisenach, Germany, formed in 2018, whose sound evolved from black metal roots into melodic doom metal. Their stylistic shift reflects a journey from raw aggression toward melancholic heaviness.