The Hammers are likely to let Alex Song return to Barcelona at the end of his loan deal this summer, meaning Sam Allardyce - or whoever is in charge next season - will need to bring in another midfielder.
The Daily Mail believe that West Ham have recently been scouting 22-year-old Susic ahead of a possible move to sign him this summer.
The Bosnian international featured for his country at last summer's World Cup, and is currently playing in Croatia for Hajduk Split, where is making quite the name for himself.
A versatile, left-footed midfielder who can play in central midfield, out wide or as an attacking midfielder, Susic has scored six goals in 30 games this season as his reputation grows.
Competition is fierce for Susic's signature, with the former Standard Liege youngster seemingly outgrowing his surroundings in Croatia - and with West Ham needing a midfielder this summer, they could well make a move to bring Susic to the Premier League.