Sutherland is already a Lions player, having played in two Tests, and in six games overall, in South Africa four years ago.
Along with Darcy Graham (wing) and Ewan Ashman (hooker) Sutherland have been drafted in to complete the Lions squad to face the Pasifika XV in Melbourne on Tuesday, 22 July.
The match takes place three days after the first Test against Australia in Brisbane and four days before before the second Test in Melbourne on 26 July.
Leinster and Ireland prop Thomas Clarkson will also join the squad in a move that will allow Test players to be rested against the Pasifika side.
Sutherland, Ashman and Graham were with Gregor Townsend's Scotland squad in New Zealand while preparing to play Samoa in Auckland on Saturday.
Graham, who was given two yellows and sent off against Fiji in Suva on Saturday, will not have to endure a suspension and will join the Lions party in Brisbane later on Monday while Sutherland and Ashman will arrive in Melbourne at the weekend.