The government of India announced the establishment of 3rd phase DIET in the year 1996-97. DIET Nalbari is the product of 3rd phase DIET. It is fully functioning in on 8th February,1999. It started its functioning from Nalbari Law College as it didn’t have its own building at that time. The opening meeting was presided by Late Prabhat Narayan Choudhury, Ex MLA on 8th Feb, 1999. The then Education minister Sjt Thaneswar Boro and Commissioner and Secretary (Education Dept.), Sjt Dinesh Ch. Barman were present at that meeting. Since 1999, DIET Nalbari has been performing its duties and activities as a nodal academic institutions at the district level for improving the quality of elementary education in the district and for providing resource support at the grass root level for the success of the programs being undertaken in the areas of elementary education. Mr. Munindra Barman was the first Principal i/c of DIET Nalbari. The District Institute of Education and Training (DIET) in Nalbari, Assam, works to enhance elementary education through teacher training, curriculum development, and pedagogical support.

DIET Nalbari organizes training programs, workshops, and research to help teachers adopt modern methods. It supports key initiatives like NIPUN Assam (foundational literacy), NISHTHA (teacher training), ECCE (Early Childhood Care and Education), Vocational Education, Value Education and 21st Century Skills such as critical thinking, creativity and digital literacy.

In addition, DIET Nalbari is actively involved in community outreach, promoting education awareness and local development through programs and engagement with local communities.

The institute also participates in SEAS (State Education and Administrative Services), LEP (Learning Enhancement Program), and national assessments like ASER (Annual Status of Education Report) and NAS (National Achievement Survey).

The District Institute of Education and Training (DIET), Nalbari is a premier institution affiliated with Gauhati University and recognized by the National Council of Teacher Education (NCTE), India. DIET Nalbari offers a range of programs, including:

• Diploma in Elementary Education (D.El.Ed.)
• Bachelor of Education (B.Ed.)