Joachim Raff's "3 Piano Pieces" Op. 126 are accomplished Romantic works, known for their melodic appeal and pianistic craftsmanship. They often combine lyrical sections with more energetic and virtuosic passages.
Focus on managing dynamic shifts and maintaining clarity in the rapid figuration.
3 Piano Pieces (Op.126) is rated Henle level 7 of 9 — late advanced repertoire, roughly ABRSM grade 8 and above.
You should be comfortable at Henle level 7 — meaning you can already play level 6–7 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
3 Piano Pieces (Op.126) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.