Abstract particulars are metaphysical entities which are both abstract objects and particulars.
Individual numbers are often classified as abstract particulars because they are neither concrete objects nor universals — they are particular things which do not themselves occur in space or time. Tropes are another example of entities cited as abstract particulars.
The concept of "abstract particularity" (German: abstrakte Besonderheit) was introduced in philosophy by G. W. F. Hegel.