I got 208 marks in jeemains paper 2 and rank:12594 which college would I get?

As per your rank its difficult to convert any NIT, SPA or any GFTIs for Architecture courses.

However there are some private engineering colleges like following where your chance is bright:

• Dehradun institute of technology
  
• ICL institute of architecture Amabala
  
• Punjab Technical University
  
• PM college of engineering Sonepat
  
• MGM Jawaharlal nehru engineering college Aurangabad.
  

Cutoff and list of all architectural colleges shared below.

https://engineering.careers360.com/exams/jee-main-paper-2/participating-colleges

NIT, Calicut (EEE, ME)
IIEST, Shibpur (CSE)
MNIT, Jaipur (EE, ME)
NIT, Warangal (Civil, Chemical)
VNIT, Nagpur (ME)
BIT, Mesra (IT)
NIT, Durgapur (ECE)
NIT, Kurukshetra (ECE)
NIT, Surathkal (Civil)

P.S. - Based on last year cut-offs.