Wingspan Nectar Resource
Height on photo - 5 mm.
Printed on Ender 3 V3 KE
Nozzle - 0.4 mm
Layer height 0.2 mm, extrusion width reduced to 0.3 mm.
I haven't printed a 3mm tall model, but it should be fine.
I placed pauses after the first 4 layers and before the last 4 layers and manually replaced the filament with a different color.