Hello Misti, 

Here is the name of colleges for 3-year LLB courses in Kolkata,

1.SARSUNA LAW COLLEGE-[SLC], KOLKATA.

2. KINGSTON LAW COLLEGE-[KLC], KOLKATA.

3. JYOTIRMOY SCHOOL OF LAW, KOLKATA.

4. THE WEST BENGAL NATIONAL UNIVERSITY OF JURIDICAL SCIENCES - [NUJS], KOLKATA,

5. FACULTY OF LAW UNIVERSITY OF CALCUTTA, KOLKATA,

6. UNIVERSITY OF CALCUTTA, KOLKATA.

Hope this will help you. Best of luck.