Although the majority of events have sold out, seats are still available in six sports including rugby sevens and weightlifting, while there is also a limited number on offer for the two ceremonies signalling the start and end of the Games.
The sale is open to anyone, including those who did not apply for tickets earlier. The previous rounds had been restricted to people who had applied for tickets before.
The remaining briefs will be sold on a first come, first served basis with telephone lines and the Games website open at 10am.
Organisers have said demand for tickets for the games has vastly outstripped supply and many sports could have been sold out many times over.
A "fair draw" process used to allocate tickets after the first round came in for criticism after it emerged people who were successful in getting tickets for one event were still in the ballot for others. This meant some people received tickets to multiple events while others were unsuccessful.
Glasgow 2014 is already confirmed as one of the most popular events in Scotland's history.
Ty Speer, Deputy Chief Executive of Glasgow 2014, said:"There are still limited tickets available to experience great sport in Glasgow, and we'd love you to join us."
Meanwhile, leading athletes have criticised Games organisers after it was confirmed the marathon will start and finish on Glasgow Green, rather than in Hampden Park .