Yes, it's possible for some people to get a seat in CS engineering with a rank of 3 lakhs in the CET. However, this will largely depend on several factors:

1. State and College: The specific state and college you're applying to will significantly influence the cutoffs. Some states or colleges may have lower cutoffs for CS engineering, especially for candidates from reserved categories.
2. Category: Your category (General, OBC, SC, ST, etc.) will play a crucial role. Candidates from reserved categories often have lower cutoffs.
3. Seat Availability: The number of seats available for CS engineering in the college you're targeting will also affect the cutoffs.
4. Counseling Process: The counseling process and seat allotment can vary from year to year, and the availability of seats at different stages of counseling can influence the final cutoffs.

It's important to note that a rank of 3 lakhs is generally considered quite high, and securing a seat in a top-tier CS engineering college might be challenging. However, by carefully considering the factors mentioned above and exploring various options, you may still be able to find suitable colleges.

To get a more accurate estimate of your chances, I recommend:

• Checking the official websites of engineering colleges in your state. They often publish previous year's cutoffs and seat allotment information.
• Consulting with academic counselors or career advisors. They can provide personalized guidance based on your rank and preferences.
• Exploring other options: If securing a seat in a top-tier CS engineering college seems difficult, consider other engineering branches or colleges that might be more accessible with your rank.

Remember, persistence and adaptability are key in the admission process. Keep exploring your options and don't give up on your goals.