H1b return notice

I have received the return notice from my petitioner and I am not clear about the reject reason which is mentioned in reject notice. Could you please clarify on the below return reject reason what is exactly is?

your petition is subject to the FY 2018 H1B numerical cap and USCIS received a sufficient number of H1B petitions to reach the numerical limitation for FY 2018 prior to receiving your petition.”

Does that reason state that my petition was part of lottery or received after lottery is over?