While it is understood the two teams had a pre-contract agreement in place, that has now expired, with Famin confirming he is still interested in a deal.
"We are talking to Andretti and to General Motors," he told select media including RacingNews365.com.
"We are happy to talk to them, if they have an entry we are happy to resume the talks. For the time being it's a bit on standby but not due to us.
"It's because the time and the length of the process is much longer than expected. First on the FIA side, the FIA took much more time to answer than they said they would at the beginning.
"The ball is on the Formula 1 side. If they have an entry we are happy to discuss with somebody. What I said last time is that we had a pre-contract. The pre-contract has expired.
"Factually right now we don't have any commitment or any legal commitment with them, but we're happy to talk to them and to see what we can do together.
"If they have an entry, it's because they will have demonstrated that they will bring you a lot of added value to Formula 1 and that the value of the championship on all the teams will not be diluted due to that."
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