In the detailed review - Bertold Ansohn: Die Innen- und die Außenwelt des Jazz. Jazztime Hildesheim. In. Jazz Podium Nr. 7/8 Juli/August 1993, pp. 42-43 -
not a word about any health troubles.
May be that the performance at the "Fabrik" in Hamburg https://fabrik.de/venue June 7, 1993 was the last one in Germany, if at all. But there was another performance in June 1993 in Weil am Rhein not announced as usual in Jazz Podium - date? It seems the trio has had its time ...
Klaus Robert Bachmann: Das Flüsterrohr und die blumige Pathetik. Jimmy Giuffre, Paul Bley, Steve Swallow. In Jazz Podium, op. cit, p. 48