The SNP Westminster leader said that the first priority of the Scottish Government would be to tackle the coronavirus crisis.
The anti-independence side actually has a slight lead when undecided voters are included in the totals.
An urgent disposal has been granted by Lord Malcolm, with a hearing set for April 6.
Constitution Secretary Mike Russell said the Bill, expected within weeks, would help inform voters ahead of the Holyrood election in May.
The procedural hearing will take place at the High Court in Edinburgh later on Wednesday.
The First Minister's spokesman said she remains 'committed' to holding a vote this year.