Haseleu was born in
Wittenberg and trained in Leipzig. He debuted in 1958 at the
Nationaltheater Weimar, and worked there until 1973. He appeared there as Leporello in Mozart's
Don Giovanni, Don Alfonso in
Così fan tutte, King Philipp in Verdi's
Don Carlos, the title role of
Falstaff and as Ochs in
Der Rosenkavalier by Richard Strauss, among others. In 1973 he moved to the
Staatsoper Dresden. On 21 April 1974, he took part in the world premiere of
Rainer Kunad's
Sabellicus at the
Berlin State Opera. In Dresden he also sang the title role in Bartók's ''
Bluebeard's Castle'' and as Moses in Schoenberg's
Moses und Aron, directed by
Harry Kupfer. He sang leading roles in the world premieres of Udo Zimmermann's
Der Schuhu und die fliegende Prinzessin on 30 December 1976 and Kunad's
Vincent on 22 February 1979 in Dresden. In 1983, he performed the title role in Aribert Reimann's
Lear at the
Komische Oper Berlin. He moved to the opera house in 1984 together with Kupfer. Haseleu appeared as Holofernes in the world premiere of
Judith by Siegfried Matthus on 28 September 1985 at Berlin State Opera. In 1988, he performed as Leporello in Alexander Dargomyzhsky's
The Stone Guest at the Komische Oper. In 1998, he took part there in Henze's
König Hirsch. Haseleu was also a guest at the operas of Leningrad, Prague, at the
Internationale Maifestspiele Wiesbaden and in Lausanne. He was also active in the pedagogical sector: He taught from 1961 to 1973 at the
Musikhochschule Weimar and from 1973 at the
Hochschule für Musik Dresden. Haseleu died June 2012 at the age of 77 years and was buried at the in Dresden. == Recordings ==