Franz Schubert's "3 Piano Pieces, D.459a" are charming and relatively early works that reveal his developing compositional voice. They are notable for their clear, song-like melodies and elegant Classical forms.
Emphasize a light and precise touch, with careful attention to phrasing and dynamic shaping.
3 Piano Pieces (D.459a) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of 3 Piano Pieces (D.459a) lasts about 9 minutes.
3 Piano Pieces (D.459a) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.