Last performance was probably 2nd October 1992; I have a bootleg from this date with ToL on it. I have a few other bootlegs after this date too and they all have TR so unless it was performed in Madrid, 6th October then Barcelona, 2nd October was the final performance.
I doubt his Father's death had any influence. I don't know him (obviously) but he doesn't appear the sentimental type to me. It is more likely to be that he doesn't feel he could do the song justice any more, certainly in terms of the energy the singing requires. Even on the OES tour it sounded quite lifeless. Also, the 96ers are more Nashville than Rock 'n' Roll, the very reason he has never performed the song in his solo career. As Ed rightly said - The Dullards. Worthy musicians, but dull for the music of DS.