The thriller films Achchamundu Achchamundu, co-starring Prasanna and Hollywood actor John Shea, and Amaravathi, were her only releases of 2009 in Tamil and Telugu, respectively. Both films won many plaudits for dealing with bold themes of pedophiles and womb stealing, respectively. The former film won many awards in the International Panorama and the later grossed average at box office.
In 2010, she starred in Venkat Prabhu's Goa. She again forayed into a glamorous ultra-modern chick role with a few shades of grey. She made cameo appearances in Vishal's Theeratha Vilayattu Pillai and the critically acclaimed Vasanthabalan directorial Angadi Theru. She also appeared in three Malayalam films. She acted in Pramani with Mammootty and paired up with Mohanlal for the first time in Shikkar, The Hunt, which was a huge success and considered as a milestone in Mohanlal's history. Her last release of 2011 was Vande Mataram. Starring opposite Mammootty again, she played an aviator in the film, which released to mixed critical response and bombed at the box-office.
In 2011, she was first seen as a tough Police Officer in Bhavani IPS, which opened to mixed reviews and bombed at the box office, although Sneha received praise for her performance. Ponnar Shankar, a period film penned by M. Karunanidhi, where she appeared as a warrior-princess, opened to mixed reviews and didn't do well at the box-office. Rajanna, a period film based on Telangana issue opposite Nagarjuna for the second time, released on December 22, 2011 to stupendous reviews.
In 2012, she appeared in a guest role along with actor Vikram for the film Marina and as an Air Hostess in a cameo role in the movie Oru Kal Oru Kannadi. Her long canned movie, Murattu Kaalai with Sundar C was released on June 15, 2012 to mixed reviews, being her first movie post marriage.
Sneha was to make her Bollywood debut with Mad Dad, alongside Naseeruddin Shah and Ayesha Takia to be directed by Revathy S Varma. Sneha was also roped in to play Sita in Rajkumar Santoshi’s Ramayan featuring Ajay Devgn in lead. However, both the projects failed to take off. She was also reported to play a major role in Kochadaiyaan to be written by K. S. Ravikumar and directed by Soundarya Rajinikanth. In December 2011, Sneha confirmed in an interview that she will be starring opposite Rajinikanth. But later, she opted out of the project to allocate dates for the film Haridas to which, is already committed. She has been rumoured to have signed Venkat Prabhu's Biriyani.
Currently, Sneha is working on three projects; Vidiyal, where she appears as a Muslim girl for the first time and also alongside actor R. Sarath Kumar, Haridas opposite Kishore and Un Samayal Arayil, a remake of Aashiq Abu's Malayalam film Salt N' Pepper being produced by Prakash Raj and stars Tabu which are currently under production.
She has appeared in many commercials like Saravana Stores, Horlicks, Roobini Oil, Aashirvadh, Idhayam Dots, Jos Aalukkas, Power Shampoos, Shree Devi Textiles, Preethi Mixi, GRB Udhayam Ghee, Papilon, Vencobb Chicken, Nisha Fairness Cream, Kellogg's Chocos, Tata Salt etc. In 2010, she was announced the brand ambassador for Dabur Amla Nelli Hair Oil and Cavin Kare's Chinni's Pickle. Post marriage, Sneha along with her husband Prasanna worked on Univercell commercials which created viral response.
She also appeared in numerous Fashion Shows like Chennai International Fashion Week, Sydney Sladen Fashion Week and other shows which were held in Chennai and Mumbai.
Marriage Sneha was paired with Prasanna for the first time in Achchamundu! Achchamundu! (2009). Since then, there were numerous reports in the media on their affair. Prasanna was spotted in all her modeling shows and both were spotted together in Movie Previews. Though, both declined it as rumour, later, on November 9, 2011 Prasanna announced, "Yes... Sneha and I decided to marry soon with the blessings of our parents. The engagement will be announced later. Someone has mentioned that our marriage would be in March 2012. There is no truth in that report. We have planned to announce our marriage date properly later on. Till then, please wait and thanks for all!" through his PR. Sneha, later acknowledged the same on November 16, 2011. They got married on May 11, 2012 in Chennai. They went to New Zealand for honeymoon. Prasanna added, "We were unable to go for honeymoon immediately after our marriage, since Sneha had to shoot for her upcoming film Haridas. A couple of weeks ago, we got some time and left for New Zealand. Sneha has not accepted any new offer since she wants to focus on family.