WASHINGTON — House Democrats said on Tuesday that they were willing to renew negotiations with the Justice Department over access to the special counsel’s full report and investigative files, but rejected a call to pre-emptively cancel a House vote to hold Attorney General William P. Barr in contempt.

Representative Jerrold Nadler of New York, the Judiciary Committee chairman who issued a subpoena for the materials at the center of a simmering dispute, said he was ready to talk immediately to try to reach a compromise, but only “without conditions” preset by the Justice Department. The House has scheduled the contempt vote for next Tuesday after weeks of refusals by Mr. Barr and his department to comply with the subpoena.

“We urge you not to make the mistake of breaking off accommodations again,” Mr. Nadler wrote in a letter to Mr. Barr on Tuesday evening. “We are here and ready to negotiate as early as tomorrow morning.”

Mr. Nadler’s rejection of the department’s request left in doubt whether it would still be willing to engage in talks. Stephen E. Boyd, an assistant attorney general, wrote in a letter to lawmakers earlier Tuesday that the Trump administration was willing to negotiate only if the Judiciary Committee withdrew its recommendation to hold Mr. Barr in contempt and Democrats postponed the final vote.