Their friendly loss to Scotland in midweek followed a setback in Romania in qualifying, but despite that blow, they remain in second place in their group.
Michael O'Neill's team won their opening three fixtures, and another three points over Finland would put them in a strong position to guarantee a minimum of a playoff place.
Lafferty has netted three goals in qualifying so far, and O'Neill will be counting on the 27-year-old to extend his tally against Mixu Paatelainen's side.
Back-to-back defeats against Romania and Hungary have left Finland adrift of the top two, and a loss in Belfast would result in an eight-point deficit to their hosts.
The Scandinavian team hit back with a win over Sweden in a friendly, but they need a repeat performance or else their hopes of qualification will slip further away.
Their attack on Sunday is expected to be headed by striker Teemu Pukki, who is currently playing for Brondby after penning a loan deal from Celtic.
Form in Euro 2016 qualifying: WWWL
Form in all competitions: LWWWLL
Possible starting lineup: Carroll; McLaughlin, Evans, McAuley, Baird, Dallas, Brunt, Norwood, Davis, McGinn, Lafferty
Form in Euro 2016 qualifying: WDLL
Form in all competitions: DLLLWD
Possible starting lineup: Hradecky, Moisander, Toivio, Raitala, Uronen, Eremenko, Sparv, Ring, Hamalainen, Hetemaj, Pukki
Sports Mole says: 1-1