Restrictions on family migration were introduced by Home Office ministers as part of the drive to reduce net migration to Britain.
Under the new rules, a British citizen who wants to bring in their spouse or dependent from India or any other country outside the 30-member European Economic Area (EEA) has to earn a minimum 18,600 British pounds a year.
The requirement rises to 22,400 British pounds to sponsor a child and 2,400 British pounds for every additional child.
The group concluded that the rules may have unintended consequences.
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These include stopping high-earning non-EU spouses from living in Britain and supporting their families, as well as impacting on British citizens who work full-time but who do not earn above the minimum threshold.
India forms 10 per cent of the total applications for immigration to the UK. Declines were shown across all of the top 20 nationalities for family visas, with the United States seeing the largest fall (-935), followed by Nepal (-678) and India (-605), Home Office data issued in May 2013 showed.
"We were struck by the evidence showing just how many British people have been kept apart from partners, children and elderly relatives. These rules are causing anguish for families and, counter to their original objectives, may actually be costing the public purse," she said.