DTE said, around 50,000 engineering seats left vacant for this academic year 2013-14.
This year 7,000 more engineering seats were added for admissions, but the application for these courses have increased by 2,000 only.
The growth of the engineering colleges leads to more vacant seats. The candidates who are interested in the engineering courses are less in numbers.
Last year a total of 44,414 engineering left vacant. This time it reached to 50,000 seats.
Most of the vacant seats are in courses like information technology, electronics and telecommunications.
Popular courses like mechanical engineering, and computer science and engineering, have vacancies as well, though in lesser known colleges in rural areas.
University-wise, Pune has the maximum vacancies (15,201), followed by Nagpur (8,862) and Mumbai (3,241) in affiliated engineering colleges.
"It is not an additional round where admissions will be open to all students. It is just for those whose names appeared on the merit list. They may not be more than 200. We are waiting for the government's sanction," said joint director Dayanand Meshram of the DTE.
A senior government official from the higher and technical education department said, "The minister is yet to sign the sanction letter for an additional window. Mostly the sanction will be given as there are so many seats vacant. The DTE has sought permission to extend the admission for three categories of students, who have not yet managed to get seats."