Events that occurred on 3 August
 On Earth
- 1943 - J.R.R. Tolkien writes a letter to Leila Keene and Pat Kirke.
- 1966 - "The Hobbit Man", an interview with J.R.R. Tolkien, is published in Oxford Mail.
- 1979 - Actress Evangeline Lilly is born.
- 1983 - Daphne Castell dies.
- 1990 - Mythcon XXI at California State University in Long Beach.
- 1991 – Priscilla Tolkien speaks on "J.R.R. Tolkien: Scholar and Storyteller" at the Martin Luther King Memorial Library in Washington, D.C.
- 2001 - Mythcon XXXII in Berkeley, California.
- 2007 - Mythcon XXXVIII in Berkeley, California.
- 2010 - The Lord of the Rings: The Card Game is announced.
- 2012 - Parma Eldalamberon 20: The Qenya Alphabet by J.R.R. Tolkien is published.