- I don't wish to pry, but …
- no quisiera entrometerme or ser indiscreto pero …
- to trespass (on sth) that's his sphere and I don't want to trespass
- eso es de su competencia y no quiero entrometerme
- it was very wrong of me to interfere
- estuve muy mal en entrometerme
- far be it from me to interfere, but …
- no es que yo quiera entrometerme ni mucho menos, pero …