Dr Ross deleted her campaign's social media pages over the weekend after her eligibility to stand for election was questioned in relation to potential business dealings with the federal government.

"Dr Ross has made the decision not to stand at the election as she did not want to spend time away from her patients," a Labor spokesperson said.

The party did not respond directly to questions over Dr Ross's eligibility to stand under Section 44 of the Australian Constitution.

In June, Dr Ross told The Daily Advertiser that she was "super excited" have been selected as Labor's third-place Senate candidate in NSW.

"The opportunity to serve the Australian people in parliament is just unimaginable - it would just be a dream come true," she said.

It would have been difficult for Dr Ross to be elected given her position on the ballot but Labor did have three NSW Senators win in 2007 on the back of a significant swing against the Coalition.

Section 44 prohibits candidates from standing in a federal election if the have "any direct or indirect pecuniary interest in any agreement with the Public Service of the Commonwealth".

Dr Ross's involvement in the Trail Street Medical Centre founder could have created an argument that she was doing business with the federal government through Medicare rebates for bulk-billing.

Dr Ross's background as a migrant from the United Kingdom could have also presented a potential Section 44 issue under rules that prohibit dual citizens from holding office.

Over the past two years, Section 44 has prompted numerous federal MPs and Senators to resign or face High Court hearings over their potential dual citizen status.

The constitutional crisis forced New England MP and then Deputy Prime Minister Barnaby Joyce to re-contest his seat in a byelection.

In a statement to News Corp, Dr Ross said she was ending her campaign for personal reasons but would remain a party member.

Her statement did not address questions over potential section 44 issues.

"After personal reflection and in consultation with my family, I have made a decision to withdraw my candidacy for the Australian Senate at this year's federal election," she said.

Three Liberal candidates in Victoria have reportedly withdrawn from the election this month after their eligibility to run under Section 44 was questioned.