WASHINGTON — Rick Gates, the former top Trump campaign adviser who pleaded guilty to financial fraud crimes and lying to investigators, is still talking to federal prosecutors.

The special counsel, Robert S. Mueller III, requested for the fifth time on Friday a delay in the sentencing of Mr. Gates, a longtime political consultant who served as the campaign’s deputy and was indicted in a scheme related to work he did for a pro-Russian leader of Ukraine.

Mr. Gates “continues to cooperate with respect to several ongoing investigations,” Mr. Mueller’s prosecutors said in a joint status report.

Because the special counsel’s office cited other, unspecified inquiries, it was difficult to tell whether the petition for a delay in sentencing gave any indication of when its broader investigation into Russia’s election interference and possible ties to Trump associates would be complete, a subject of intense speculation.