Referring to incidents of attacks on Indian students in Australia, some of which were allegedly racial in nature, she asserted that Australia has "zero tolerance" for any racial behaviour.
During an interaction with journalists, Ms Sidhu also emphasised that the bilateral ties have seen a "steady upward trajectory" and Australian Prime Minister Malcolm Turnbull's recent visit has "injected a fresh momentum" in the relationship.
"We have diaspora from 120 countries living in Australia. These restrictions are only to maintain our integrity. There is no intension to target any country, including India," Ms Sidhu said.
Australia last month announced scrapping of the popular 457 work visa used by over 95,000 foreign workers, majority of them Indians, to tackle the growing unemployment and replace it with a new programme requiring higher English-language proficiency and job skills.
"I cannot categorically tell you what will happen in the future. We constantly reviewed our visa regime, there is a constant change.... And, as far as the 457 visa (skilled temporary overseas workers) is concerned, we just want to see, if that job can be done by an Australian, before one employs someone from outside.
Prime Minister Narendra Modi last week had conveyed India's concerns about the changes in visa policy to Mr Turnbull. Senior Australian officials had conveyed to India that "the impact of the changes will be negligible on Indian workers, most of whom fall in high skill category."
The High Commissioner said the 457 visa regime only concerns temporary work visas, and the number of Indian students and permanent migrants is continuously growing.
"In 2016, about 2,80,000 visas were issued to Indians. For education, the number of visa has gone up dramatically. In 2014, it was 46,000 students, 2015 it was 53,000 and in 2016, it went up to over 60,000.
"Also, about the attacks on students in Australia, we have said that all the attacks weren't racial in nature. Many were criminal attacks. Australia does not have tolerance for racial behaviour," she added.