The short answer is not really! The shortest you can do the Kangchenjunga Circuit Trek is about 15 days – with 8 days trekking, the rest are travel and essential rest/acclimatisation days.
You might see shorter treks advertised but be very careful – they will involve very long days and rapid altitude changes with not enough acclimatisation. This can get unsafe.
You might see marketed a "Ghunsa village trek" but this is just the early part of the Kanchenjunga trail up to Ghunsa village and then returning the same way which is not really worthwhile.
