Some of the answer to your question may lie in your pathology report - Gleason score, margins, seminal vesicles, ECE...if your PSA dropped to undetectable after surgery, and margins, SV and ECE were negative and BCR three years later then you may benefit from SRT and short term ADT. Short term generally is six months, not three. If you have multiple high risk factors - GS 8-10, your margins, SV or ECE were positive, your PSADT <12 months then 18-24 may be necessary. Also, did you have any imagining such as the Aximun or PSMA? Did you and your medical team discuss whether or not gto include the pelvic lymph nodes in your treatment?