Police Scotland have confirmed that the three people who died in the collision at 4.05pm yesterday near Little Swinton were a 64 year old man, a 63 year old woman and a 71 year old man, all from the Greater Glasgow area.
Police said that further details will be made available once next of kin have been informed.
Anyone wishing to leave a floral tribute should do so at the Village Green in Swinton, where an area has been set aside.
Commenting on the tragic incidents at the Jim Clark Rally on Saturday 31 May, Scottish Borders Council Convener Councillor Graham Garvie said: “All our thoughts are with the families who have lost loved ones or whose loved ones were injured as a result of the tragic accidents yesterday. We offer them our sincerest condolences.
“The Jim Clark Rally and rallying generally is a longstanding and important part of our culture here in the Borders and our close knit community has been hit hard by yesterday’s events.
“The Council, working with partner agencies, will ensure it offers the maximum level of support not just to our local communities, but to everyone affected by yesterday’s tragic events. “