Am I too skinny to get a fat transfer to butt??

anyone is a candidate to get fat transferred to the buttock.  The real question is do you have enough fat to give a significant change, the answer is prob no.  However, most of my patients want body sculpting and definition and we can do that on someone athletic like you.  Whatever fat is there can be used for transfer and also combined with sculptra/PRP to get more optimal outcomes for buttock.  OR you can consider a buttock implant but sculpting on the rest of your body.  Best, Dr. Emer.

Hello and thank you for your question. Based on your photograph, you are a
candidate for waistline contouring liposuction of your abdomen, flanks,
and lower back and fat grafting to your buttocks.  This can improve your overall shape with a smaller waist.  Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results.  The most important
aspect is to find a surgeon you are comfortable with. I recommend that you seek
consultation with a qualified board-certified plastic surgeon who can evaluate
you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

It is really unfortunate you had the previous liposuction because a lot of good "building material" was thrown away.  From the photos you provided it appears you could harvest fat from the thighs and lower back. The result would give a little rounding and lift to the buttocks but no real change in size. Since the fat you still retain has no negative impact on your appearance and is not enough to have significant results for body augmentation you you may consider not doing anything and use it when you are older for face contouring.