The 22 year-old has only been at the French outfit since January due to a lack of game time in Russia but hasn't had any trouble settling in with 9 goals and 5 assists in just 12 appearances.
Maris's contribution might not prove to be enough to help Valenciennes out of the relegation zone with the club 6 points shy of survival.
This hasn't gone unnoticed in England, where it is said that Newcastle United, West Bromwich, Hull City and newly promoted team Leicester City were all watching in the stands when Valenciennes went down to Lyon last weekend.
Everton also sent a scout to watch Waris during last month where Roberto Martinez's emissary saw Waris net himself a brace.