Open the Raw Burst Mode image roll with the Raw Burst Image Tool in Canon Digital Photo Professional.
Limitations with Canon's Raw Burst Mode in Camera Raw and Lightroom
Adobe Camera Raw and Adobe Photoshop Lightroom offer standard support for all Canon cameras included in the list of supported cameras. Do note that Canon’s Digital Photo Professional software is required if you want to take advantage of Canon’s Raw Burst Mode feature available in some Canon cameras.
Pre-processing Canon CR3 Raw Burst Mode image rolls (continuously-shot images) before importing
Save one or more individual images from roll.
You can now import or open the resulting CR3 file(s) in Adobe Camera Raw or Lightroom.
Canon CR3 Raw Burst Mode image roll files are not readable by Adobe Camera Raw or Lightroom.