Glazunov's etudes from Op. 31 are significant works that explore technical challenges within a rich harmonic and melodic context. They are known for their virtuosic demands and expressive depth.
Focus on achieving a powerful and clear sound with rapid fingerwork.
3 Études pour le Piano (Op.31) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
3 Études pour le Piano (Op.31) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.