I'm a PhD student working on a mixed-methods research project for my thesis, with the first phase being quantitative and the second being qualitative. Then, as intended, I'll undertake the intervention phase as the third phase. However, the submission date is approaching, and I will not be able to complete the third phase. Now I have finished both phases and now in the fourth year. My issue is whether I may make changes to my thesis and remove the third phase while remaining in the first and second phases, which is allowed for PhD students.