I haven't seen a tent stove at about 3 pounds. But I know a few four-pound tent stoves. Pomoly T1 Mini Tent Stove is made of 1mm titanium plate, which is strong and durable. The strongest. The weight is 4.6lb. It is a little smaller, Stove Body Dimension 12 x 7.7x 6.3 in (30.5 x 19.5 x 16 cm), suitable for single camping.
Pomoly TIMBER Titanium Tent Stove: Made of 0.6mm titanium plate, it has good sturdiness and good volume.
3W tent Stove: It is made of 0.5mm titanium plate and weighs 4.01 lb. Robustness is average.