This is a L-Bracket for mounting the camera horizontally as well as vertically, without changing the position of the tripod head.

Additionally, there is a hook on the bottom to make it possible to clip to a backpack, strap or similar.

Print in the orientation of the images above. 

For Parts 1 and 2, supports are not needed.

for Part 3 I would recommend turning on supports and 100% rectilinear infill.

required for assembly:
- 2x M3 x 15mm
- 1x M3 x 8mm
- 1x 1/4" screw

Screw together parts 1 and 2 with the M3 x 15mm screws. Optionally add the stabilizing pin at the top with the M3 x 8mm screw, which fits into the strap attachment on the camera. 

I made this part for the Canon 250D, but it might work for other similarly sized cameras.