This is a contemporary concerto arrangement for solo piano by Gerasimos S. Ninos. It is characterized by dense harmonic textures and a modern approach to pianistic structure.
Focus on balancing complex, thick chordal passages with clear melodic articulation.
Comparable difficulty and character — good candidates for what to learn next.
CONCERTO No 3 is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 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 CONCERTO No 3 lasts about 8 minutes.
CONCERTO No 3 is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Boléro by Maurice Ravel, Prelude in C-sharp minor, No. 2 by Sergei Rachmaninoff, Prelude in G minor, No. 5 by Sergei Rachmaninoff — see the full similar-pieces list on this page.