The team started the final day’s play with an encouraging 17-0 victory against China in the Bowl semi-final.
However, similar errors to those on the opening day cost them in their final match against 2016 Olympic Games hosts Brazil.
Lorinda Brown, Veroeshka Grain and captain Marithy Pienaar all scored tries against China, with Pienaar converting one of them for their 17 points.
They supported this with a fine defensive effort, which denied the opposition from scoring a single point.
They were unable to replicate this form against Brazil as errors at crucial times combined with the opposition’s ability to retain possession for long periods, forced them onto the back-foot from the outset.
Brazil made the most of their possession and scored two tries in the first half, one of which was converted, for a 12-0 lead at the break.
They built on this in the second half by scoring their third try as they capitalised on a lost lineout by the Springbok Women to extend their lead to 17-0.
Pienaar, however, scored a converted try in the dying minutes after a good attacking spell by the Bok Women, which allowed them to reduce the deficit to 17-7.
But with the clock winding down fast, the team was unable to add to their score.