Diabless is an atmospheric death metal band from Pernik, Bulgaria, active since 2013 with a self-titled debut spanning twelve tracks of sprawling, mood-driven extremity. Their longer compositions emphasize atmospheric progression alongside heavy, deliberate instrumentation.

Diablop is a black, death, and thrash metal band from Lipsko, Poland, formed in 2003. The project fuses three pillars of extreme metal from the Mazovia region.

Diachronia is a black and death metal band from Bielsko-Biala, Poland, formed in 2017. The project merges black metal's darkness with death metal's aggression from the Silesian Beskids.

Diaclast is a technical death metal band from Yekaterinburg, Russia, formed in 2014. The project delivers technically precise death metal from the Ural capital.

Diagnosis: Human is a progressive death/thrash metal band from Bern, active since 2013 and treating the human condition as a pathology to be dissected through complex, technically demanding compositions. Their clinical name frames their music as an examination of humanity's flaws through the scalpel of extreme metal.

Diagoras is a technical death metal band from Gothenburg, Sweden, formed in 2018. The project delivers technically precise death metal from the west coast.

Diamond is a death metal band from Syktyvkar, Russia, formed in 2014. The project channels aggressive death metal from the Komi Republic.

Diamonds Are Forever is a metalcore/deathcore band from Cluj-Napoca, active since 2011 and bringing modern extreme metal to Transylvania's largest city. Their James Bond-quoting name adds unexpected glamour to a sound built on crushing breakdowns and guttural vocals.

Dianthus is a death and thrash metal band from Myslowice, Poland, formed in 1996. One of the veteran extreme metal acts in the Upper Silesian scene, the project has delivered decades of death/thrash.