D&D 5E What is timeline relationship between BG3 and BD:DIA? (minor spoilers)

[ECMO3]

There are a lot of similarities and thematic ties between BG DIA and BG3:

Refugees, references to the blood war and Zariel, the Dead 3, Duke Ravenguard, Hell Riders. The Refugees flooding Basilisk gate in particular is identical to chapter 1 of DIA.

That said they can not be happening at the same time because in BG DIA Ravengard is in Hell and in BG 3 he is not.

Is there a cannon timeline of events at play here?

 

[Paul Farquhar]

Is there a cannon timeline of events at play here?

No.

Both take place after Decent to Avernus (that was when development started on both games), but BG3 supposes a different outcome to that adventure.

WotC policy: "there is no canon".

Applies double with regard to computer games.

 

[MerricB]

Wizards has a problem when it comes to canonical timelines in the 5E era. They basically don't want to advance the timeline.

Teos "Alphastream" Abadia did a good article about when most of the adventures are set. You can find it here: The Official Timeline for the Forgotten Realms and Its Adventures | Alphastream

As you can see, Descent into Avernus is potentially 1494 DR.
The official date of BG3 is 1492 DR.

Despite that, BG3 refers to events of DiA.

(Alphastream's notes: "The adventure Descent into Avernus has a Baldur’s Gate gazetteer that describes it as being in 1492 DR. However, Elturel descends in 1494.")

Honestly, I have no faith in any aspect of Forgotten Realms lore from anyone at the current Wizards of the Coast. Larian is far more attentive to details than they are.

Cheers,
Merric