Slotte was born in Helsinki. He studied history at the University of Helsinki and graduated as Master of Philosophy in 1955. He was a negotiating officer from the Ministry for Foreign Affairs from 1973 to 1977, Ambassador to Ankara in 1977–1983, Administrative Under-Secretary of State since 1983, Ambassador in Canberra from 1988 to 1991 and in Dublin from 1991 until his retirement, until 1996.
- Tarkka, Jukka (1986). Kuka kukin on: Henkilötietoja nykypolven suomalaisista 1986 (in Finnish). Helsinki: Kustannusosakeyhtiö Otava. p. 898. ISBN 951-1-08445-3.
- Törnudd, Klaus (17 November 2019). "Nekrolog: Ulf-Erik Slotte". Hufvudstadsbladet (in Swedish). Helsingfors. p. 41.
- Facta 2001, vol. 15, col. 61. Helsinki: WSOY 1985.
- Slotte, Ulf-Erik in Uppslagsverket Finland (in Swedish)
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